DOCSLIB.ORG

New Approaches to Casting Hypereutectic Al-Si Alloys to Achieve Simultaneous Refinement of Primary Silicon and Modification of Eutectic Silicon

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

New Approaches to Casting Hypereutectic Al-Si Alloys to Achieve Simultaneous Refinement of Primary Silicon and Modification of Eutectic Silicon A thesis submitted for the degree of Doctor of Philosophy by Kawther W. A. Al-Helal Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University October 2013 This thesis is dedicated to my family for their love, support and encouragement i َ بِ ْس ِمِِّللاِِال َر ْح َم ِنِِال َر ِحي ِمِِ آ ُتو ِني ُز َب َر ا ْل َح ِدي ِد ۖ َح َّت ى إِ َذا َسا َو ى َب ْي َن ال َّص َد َف ْي ِن َقا َل انفُ ُخوا ۖ َح َّت ى إِ َذا َج َع َل ُه َنا ًرا ُ ْ َ ْ َقا َل آ ُتو ِني أ ْف ِر ْغ َع َل ْي ِه ِقط ًرا َف َما ا ْس َطا ُعوا أن َيظ َه ُروه ُ َو َما ا ْس َت َطا ُعوا َل ُه َن ْق ًبا. صدقِّللاِالعظيمِ الكهف:ِمنِاﻵية 95 In the name of Allah, the Entirely Merciful, the Especially Merciful ‘’ Bring me blocks of iron, when he had filled up the space between the two steep mountain-sides, He said, "Blow (with your bellows)" Then, when he had made it (red) as fire, he said: "Bring me molten Lead, that I may pour over it. So Gog and Magog were unable to pass over it, nor were they able (to effect) in it any penetration’’. Surat Al-Kahf: 95 Holy Quran ii Abstract Hypereutectic Al-Si alloys are of increasing interest for applications that require a combination of light weight and high wear resistance, such as pistons, liner-less engine blocks and pumps. The wear resistance of this class of alloys is due to the presence of hard primary Si particles formed during casting. The objective of this work was to develop one or more methods of refining primary silicon in cast hypereutectic Al-Si alloys to compete with the conventional process of adding phosphorous and to achieve the simultaneous modification of silicon in the Al-Si eutectic. A robust sampling/casting technique was developed to minimise macro-segregation of primary silicon during solidification of hypereutectic Al-Si alloys by using water cooled steel mould with cooling rate in excess of 15 K/s. The morphology of silicon phases was found to change with increasing melt temperature and cooling rate. The high cooling rate and superheat temperature produces a good distribution of polyhedral primary silicon particles in a refined lamellar eutectic matrix in solidification of commercial purity Al-Si alloys. Removing Ca by fluxing with K2SiF6 prior to casting can improve the refinement and modification effect of Mg and Sb respectively. Effects of various inoculants were studied. Microstructural analysis showed that Mg and ZnS refined primary Si whereas MgO, CaO and Na2S coarsened the primary Si together with a modification effect on the eutectic Si. Adding Zn had no effect on morphology of Si phases. Refinement of both primary and eutectic silicon phases was observed for the Al-15Si alloy with Mg content ≤ 0.3 wt%. P-doped γ-Al2O3 was found to be a potent substrate to nucleate primary silicon whilst good modification of the eutectic matrix is retained during solidification of hypereutectic Al-Si alloys. On using P-doped γ-Al2O3 could be a perfect and clean source of P without additional impurities. A new solid-liquid duplex casting process was devised to achieve simultaneous refinement and modification of Si phases in hypereutectic Al-Si alloys with improvement in mechanical properties. The static mechanical properties of Al-Si produced by the solid-liquid duplex casting process are significantly better than conventionally cast untreated Al-Si and slightly better than conventionally cast Al-Si treated with P and/or Sr. A novel Al-ZnS master alloy was developed by in situ reaction of Zn and Na2S in the Al melt. The results from this study leave little doubt that this novel Al-ZnS master alloy is a promising refiner in solidification of hypereutectic Al-Si alloys. It refines primary silicon to the same extent as that achieved by adding P via Cu-P following the same refinement mechanism. iii Preface This thesis is a description of work that I performed in the Brunel Centre for Advanced Solidification Technology, Brunel University, West London from 22nd October 2009 to 30th October 2013. To the best of my knowledge, this work is original, except where suitable references are made to previous work. Neither this, nor any substantially similar dissertation has been submitted to any other institution nor is it the result of my own work. The content of the dissertation does not exceed 60,000 words. iv Related Publications International Journal Papers Kawther W. Al-Helal, Ian C. Stone and Zhongyun Fan, ‘’Simultaneous Primary Si Refinement and Eutectic Modification in Hypereutectic Al-Si Alloys”, Trans. Indian Inst. Metals. (December 2012) 65(6):663–667. Kawther W. Ahmed Al-Helal, Yun Wang, Ian C. Stone and Zhongyun Fan, ’Effect of Ca Level on the Formation of Silicon Phases During Solidification of Hypereutectic Al-Si Alloys’’, Mat. Sci. Forum Vol. 765 (2013) pp 117-122. Kawther Al-Helal, Ian C. Stone and Z. Fan, ‘’Morphology of Silicon Phases in Solidification of High Purity Hypereutectic Al-15Si Alloy’’, 2013. The paper is in preparation. Kawther Al-Helal, Ian C. Stone and Z. Fan, ‘’Novel Al-ZnS Master Alloy for Refinement of Primary Silicon Crystals in Solidification of Hypereutectic Al-Si Alloys’’, 2013. The paper is in preparation. Kawther Al-Helal, Ian C. Stone and Z. Fan, “Effect of Solidification Rate on Macro Segregation and Morphologies of Silicon phases in Solidification of Hypereutectic Al-15Si Alloy”, 2013. The paper is in preparation. Conferences The John Hunt International Symposium, Brunel University, UK, December 12 -14, 2011. National Student Conference in Metallic Materials, Manchester Conference Centre, UK, June 25-26, 2012. Fifth International Conference on Solidification Science and Processing, Bhubaneswar, India, November 19-22, 2012 / Poster. Sixth International Light Metals Technology Conference (LMT2013), Windsore, UK, July 24-26, 2013. v Acknowledgements I would like to express my sincere gratitude and grateful admiration to my supervisors Prof. Zhongyun Fan and Dr. Ian Stone for their encouragement, continuous guidance, utmost effort and interest through the work that contributed in its completeness. I am grateful to the EPSRC, UK for funding this project and my special thanks and sincere gratitude to Prof. Paul Harris / Wolfson Materials Processing Centre, Prof. Andy Feest and Dr. Kumar Sundaram / Oxford University for their help and useful discussion throughout my PhD programme. My thanks to Aura Metals Ltd for supplying the CuP shot that I used during my research. I am in great debt to Prof. Dmitry Eskin and Dr. Hari-babu Nadendla for their obliging and fruitful support on all topics and through all stages of this work. I have received technical help/suggestions from many people at BCAST during the course of this work. I want to specially mention Dr. Yun Wang, Dr. Jayesh Patel, Dr. Yubo Zuo, Dr. Magdalena Nowak, Dr. H-T Li, Dr. Anil Midathada and Dr. Prasadd Ayyagari for their scientifically helpful and discussions. My special thanks to Mr. Stephen Cook, Mr. Peter Lloyd and Mr. Carmelo Nunez for their technical support. I wish to express my thanks to my colleagues at BCAST for their support and letting me fell part of the team whenever we worked together. Finally, I wish to express my deepest respect and sincere appreciation to my family for their encouragement, patience and great understanding. vi Table of Contents Abstract ........................................................................................................................ iii Preface ........................................................................................................................ iv Related Publications ..................................................................................................... v Conferences ................................................................................................................. v Acknowledgements ...................................................................................................... vi Table of Contents ........................................................................................................ vii List of Figures .............................................................................................................. xii List of Tables ............................................................................................................. xxii Nomenclature ........................................................................................................... xxiv Chapter 1 Introduction ........................................................................................... 1 1.1 Background ........................................................................................................... 1 1.2 Objectives and Scope ............................................................................................. 3 1.3 Outline of Thesis …...……………………………………………………………………..4 Chapter 2 Literature Review ................................................................................. 5 2.1 Introduction to Al-Si Alloys ...................................................................................... 5 2.2 The Al-Si Alloy System and Properties.................................................................... 6 2.3 Hypereutectic Al-Si Alloys ....................................................................................... 9 2.4 Inclusions and Oxides ..........................................................................................
Recommended publications
  • Studies on Properties of Al–Sic Metal Matrix Composite Material for Making IC Engine Valves

    Studies on Properties of Al–Sic Metal Matrix Composite Material for Making IC Engine Valves

    Proceedings of the World Congress on Engineering 2018 Vol II WCE 2018, July 4-6, 2018, London, U.K. Studies on Properties of Al–SiC Metal Matrix Composite Material for Making IC Engine Valves Nilamkumar S. Patel, Ashwin D. Patel, Ritesh Kumar Ranjan, Vikas Rai Abstract-Automobile industries are using material substitution the matrix also helps to transfer load among the composite for to build lighter weight, and fuel efficient engines, offering is compound material which differs from alloy due to fact better properties materials of engine components, including that all the individual component retain its characteristic. engine poppet valves and valve seats. Valves and valve seats are very important components that are used at high operating II. EXPERIMENTAL SET-UP temperature to control the flow and volumetric efficient at desired level of engine performance. The present work Stir casting process is liquid state processing. It is simple describes that Al-SiC composite as possible alternate materials and flexible process. In this process, there is mixing of with its unique capacity to give required properties for engine matrix and reinforcement. poppet valves and valve seats. Al-SiC MMC is prepared by In this process, reinforcement particles are added into the powder metallurgy and various casting techniques. In the research a composite is developed by stir casting process by molten matrix metal. And then the proper mixture is done using aluminium alloy with silicon carbide Nano particles and by hand stirring as well as Mechanical stirring. And then substitute sintering operation at 600oC temperature for one this mixture is allowed to pour into the mould shape.
  • A Review on Comparison of Aluminium Alloy LM-25 with Al/Sic

    A Review on Comparison of Aluminium Alloy LM-25 with Al/Sic

    International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 01 | Jan-2018 www.irjet.net p-ISSN: 2395-0072 A review on comparison of Aluminium alloy LM-25 with Al/Sic Rahul Ushir1 , Kunal Gandhi2, Gaurav Dahe3, Vijay Bidgar4, Prof. Vishal Thakre5. 1,2,3,4 BE student Mechanical, SND COE & RC, YEOLA, Maharashtra, India 5Prof. Mechanical, SND COE & RC, YEOLA, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract- Many industries suffered a great loss of materials and procedures to decrease the wear of devices manufacturing process due to collapse of manufacturing and designing segments. These incorporate change of mass machines due to wear and fail of lubrication. Friction is main properties of the materials, surface medications and cause of wear and energy dissipation. Improving friction can utilization of covering, and so on. In the course of the most make substantial saving. It is obvious that enormous amount recent couple of years, numerous endeavors have been made of the worlds resources are used to overcome friction in the to comprehend the wear conduct of the surfaces in sliding form or another. Lubrication is an effective means of contact and the instrument, which prompts wear. The controlling wear and reducing friction. Hence, for the survival applications of aluminium and its alloys for the machine of machine wear and friction must be decreased parts are increasing day to day in the industry. However, and/controlled carefully. little has been reported on the wear behaviour of aluminium and its alloys with the addition of grain refiner and modifier. Key words: Silicon Carbide(Sic) , aluminium LM25,scanning electron microscope ( SEM ) , metal PROBLEM DEFINITION: matrix composite ( MMCs) .
  • Aluminium Products Coil

    Aluminium Products Coil

    Helping manufacturers across the globe achieve sustainable leaner manufacturing processes Aluminium Coil, Foil, Products Sheet & Wire Commercially Pure Aluminium Alloys Series 1000 Series 2000 Series 3000 Fast Series 4000 Series 5000 Turnaround Series 6000 Processing Series 7000 Series 8000 Clad Aluminium WIDE STOCK RANGE Low Width Thickness Ratio 3:1 unique to the industry (normal minimum is 8:1) Over 75 years Experience Knight Group Visit our websites: Main: www.knight-group.co.uk Offcuts: www.ksmdirect.co.uk www.pmdirect.be Head Office Linkside, Summit Road Cranborne Industrial Estate Potters Bar, Hertfordshire EN6 3JL United Kingdom Main Office : +44(0)1707 650251 Fax: +44(0)1707 651238 [email protected] Knight Strip Metals Ltd Sales, Processing & Warehouse Saltley Business Park Cumbria Way, Saltley Birmingham B8 1BH United Kingdom Telephone: +44 (0)121 322 8400 Fax: +44 (0)121 322 8401 Sales 08456 447 977 [email protected] Precision Metals EU Industriezone Mechelen-Noord (D) Omega Business Park Wayenborgstraat 25 2800 Mechelen Belgium Telephone: +32 (0) 15 44 89 89 Fax: +32 (0) 15 44 89 90 [email protected] The information contained herein is given in good faith and is based on our present knowledge and experience. However, no liability will be accepted by the Knight Group and its subsidiaries in respect of any action taken by any third party in reliance thereon. Any advice given by the Company to any third party is given for that party’s assistance only and without any liability on the part of the Company. The contents of this brochure are subject to change and the most recent edition of all Knight Group documentation can be found on our website or by written request.
  • Maec.19 70 (University of London) London

    Maec.19 70 (University of London) London

    COMPLEX & INCREMENTAL STRESS CREEP OF A HIGH STRENGTH ALUMINIUM ALLOY AT ELEVATED TEMPERATURES (ALLOY: HIDUMINIUM RR58 SPECIFICATION DTD 731) by SURINDAR BAHADUR MATHUR Thesis presented in the Department of Mechanical Engineering for the Award of the Doctor of Philosphy in Mechanical Engineering of the University of London. Mechanical Engineering Department Imperial College of Science and Technology mAec.19 70 (University of London) London. ABSTRACT A theory for creep rates under complex and incremental stresses is deduced from experimental data concerning complex creep at elevated temperatures for the test material HIDUMINIUM RR 58 - Specification DID 731. The most important results are for tubular specimens tested at 150°C and 250°C under incremental loads. The analysis of results relates to steady state creep only. Modified relationships in stress equivalence and strain equivalence are proposed to account for thermal softening, polygonization, recrystallization and the resulting exaggerated flow in the direction of the applied shear. (The original equations are based on the hypothesis of Von Mises). A further relationship is suggested between the immediate total energy of distortion and the subsequent creep work rate. Results of the static tests and the results of the tests for creep behaviour under complex loading are presented and compared with the results of static torsion and simple incremental torsion creep tests on the basis of the proposed equations. An appendix describes the complex creep testing machine, furnace, extensometers
  • Review on Multi-Pass Friction Stir Processing of Aluminium Alloys

    Review on Multi-Pass Friction Stir Processing of Aluminium Alloys

    Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 22 July 2020 doi:10.20944/preprints202007.0514.v1 Review Review on Multi-Pass Friction Stir Processing of Aluminium Alloys Oritonda Muribwathoho1, Sipokazi Mabuwa1* and Velaphi Msomi1 1 Cape Peninsula University of Technology, Mechanical Engineering Department, Bellville, 7535, South Africa; [email protected]; [email protected] * Correspondence: [email protected]; Tel.: 27 21 953 8778 Abstract: Aluminium alloys have evolved as suitable materials for automotive and aircraft industries due to their reduced weight, excellent fatigue properties, high-strength to weight ratio, high workability/formability, and corrosion resistance. Recently, the joining of similar and dissimilar metals have achieved huge success in various sectors. The processing of soft metals like aluminium, copper, iron and nickel have been fabricated using friction stir processing. Friction stir processing (FSP) is a microstructural modifying technique that uses the same principles as the friction stir welding technique. In the majority of studies on FSP, the effect of process parameters on the microstructure was characterized after a single pass. However, multiple passes of FSP is another method to further modify the microstructure in aluminium castings. This study is aimed at reviewing the impact of multi-pass friction stir processed joints of aluminium alloys and to identify a knowledge gap. From the literature that is available on multi-pass FSP, it has been observed that the majority of the literature focused on the processing of plates than the joints. There is limited literature reporting on multi-pass friction stir processed joints. This then creates a need to study further on multi-pass friction stir processing on dissimilar aluminium alloys.
  • The Effect of Cooling Rate on the Microstructure of A356 Aluminium Alloy

    The Effect of Cooling Rate on the Microstructure of A356 Aluminium Alloy

    SVOA MATERIALS SCIENCE & TECHNOLOGY (ISSN: 2634-5331) Research https://sciencevolks.com/materials-science/ Volume 2 Issue 4 The Effect of Cooling Rate on the Microstructure of A356 Aluminium Alloy Maftah H. Alkathafi1*, Abdalfattah A. Khalil2, Ayad O. Abdalla3 Affiliations: 1Mechanical Engineering Department, Faculty of Engineering, Sirte University, Libya 2Materials Science Department, Faculty of Engineering, Omer Al-Mukhtar University, Libya. 3College of Mechanical Engineering Technology, Benghazi-Libya. *Corresponding author: Maftah H. Alkathafi* Mechanical Engineering Department, Faculty of Engineering, Sirte University, Libya Received: December 10, 2020 Published: December 31, 2020 Abstract: In this study a fast-cooling technology is employed for a cast iron mould to prepare cast A356 aluminium alloy by solidifica- tion of the molten metal. The cooling rate is achieved by pouring the molten alloy into a preheating permanent mould at different temperatures (25, 100, 200, 300 and 4000C) for cast samples with 40 mm inside diameter and 200 mm height. The samples considered are analyzed by optical microscopy, scanning electron microscopy (SEM), and EDS X-ray analysis (EDS). The effects of cooling rate on the morphology of α – aluminum and eutectic silicon of A356 alloy have been studied. The results showed that the dendritic structure of α-phase was broken and converted into a somewhat globular grain structure and the coarse acicular eutectic silicon trend to be broken and converted into short sticks or small rounded in other cases. Keywords: A356 Aluminum alloy, Grain refinement, Cooling rate, SEM, EDS, Microstructure. 1. Introduction Aluminium alloys have attractive physical and mechanical properties. They are lightweight, low costs production, easy to machine and have good recycling possibilities up to 95 % [1].
  • Aluminium Alloy - 6262 - T6 Extrusions

    Aluminium Alloy - 6262 - T6 Extrusions

    Aluminium Alloy - 6262 - T6 Extrusions SPECIFICATIONS CHEMICAL COMPOSITION Commercial 6262 BS EN 573-3:2009 Alloy 6262 EN 6262 Element % Present Magnesium (Mg) 0.80 - 1.20 Aluminium alloy 6262 is a heat treatable alloy with Copper (Cu) 0.15 - 1.40 very good corrosion resistance and strength. Additions of bismuth to the alloy mean that 6262 has excellent Silicon (Si) 0.40 - 0.80 machinability and surface finish. Lead (Pb) 0.40 - 0.70 High-speed steel or carbide tooling can be used to obtain smooth finishes. Heavy cutting requires oil Bismuth (Bi) 0.40 - 0.70 lubricant but light cutting can be done dry. Iron (Fe) 0.0 - 0.70 Alloy 6262 can be used in place of 2011 when higher corrosion resistance and better anodising response is Zinc (Zn) 0.0 - 0.25 required. Chromium (Cr) 0.04 - 0.14 Applications Titanium (Ti) 0.0 - 0.15 6262 is commonly used in the manufacture of: Manganese (Mn) 0.0 - 0.15 Screw machine products Camera parts Others (Total) 0.0 - 0.15 Nuts Other (Each) 0.0 - 0.05 Couplings Aluminium (Al) Balance Marine fittings Decorative hardware and appliance fittings Hinge pins Oil line fittings ALLOY DESIGNATIONS Valves and valve parts Aluminium alloy 6262 also corresponds to the following standard designations and specifications but may not PLEASE NOTE: Due to European Environmental be a direct equivalent: Protection Directives: AA6262 # 2000/53/CE-ELV – For the automotive sector Al 1.0Mg 0.6Si Pb # 2002/95/CE-RoHS – For the electrical and A96262 electronics sector This alloy has been replaced by Alloy 6026 which has a PLEASE NOTE: Due to European Environmental lower Lead content.
  • Metallurgical Abstracts (General and Non-Ferrous)

    Metallurgical Abstracts (General and Non-Ferrous)

    METALLURGICAL ABSTRACTS (GENERAL AND NON-FERROUS) Volume 2 1935 Part 13 I —PROPERTIES OF METALS (Continued from pp. 553-568.) Refined Aluminium. Robert GaDeau (Metallurgist (Suppt. to Engineer), 1936, 11, 94-96).—Summary of a paper presenteD to the Congrès Inter­ nationale Des Mines, De la Métallurgie, et De la Géologie Appliquée, Paris. See Met. Abs., this vol., pp. 365 anD 497.—R. G. _ On the Softening and Recrystallization of Pure Aluminium. ------ (A lu­ minium, 1935, 17, 575-576).—A review of recent work of Calvet anD his collaborators ; see Met. Abs., this vol., pp. 453, 454. A. R. P. *Some Optical Observations on the Protective Films on Aluminium in Nitric, Chromic, and Sulphuric Acids. L. TronstaD anD T. HbverstaD (Trans. Faraday Soc., 1934, 30, 362-366).—The optical properties of natural films on aluminium were measureD in various solutions anD their change with time of immersion observeD. Little change occurs in such films in chromic aciD solutions with or without chloriDe ; the films are not protective in concentrateD sulphuric aciD, anD in concentrateD nitric aciD the protective films are alternately DissolveD anD re-formeD. The mean thickness of natural films on aluminium is 100 p. or more than 10 times as thick as those on iron.—A. R. P. *Light from [Burning] Aluminium and Aluminium-Magnésium [Alloy], J. A. M. van Liempt anD J. A. De VrienD (Bee. trav. chim., 1935, 54, 239-244). „ . —S. G. ’"Investigations Relating to Electrophotophoresis Exhibited by Antimony Gisela Isser anD AlfreD Lustig (Z . Physik, 1935, 94, 760-769).—UnchargeD submicroscopic particles subjecteD to an electric fielD in an intense beam of light are founD to move either in the Direction of, or against, the fielD.
  • Hybrid Sol-Gel Coatings: Smart and Green Materials for Corrosion

    Hybrid Sol-Gel Coatings: Smart and Green Materials for Corrosion

    coatings Review Hybrid Sol Sol-Gel‐Gel Coatings: Smart and Green Materials for Corrosion Mitigation Rita B. Figueira 1,*, Isabel R. Fontinha 1, Carlos J. R. Silva 2 and Elsa V. Pereira 1 Rita B. Figueira 1,*, Isabel R. Fontinha 1, Carlos J. R. Silva 2 and Elsa V. Pereira 1 1 LNEC, Laboratório Nacional de Engenharia Civil, Av. Brasil 101, Lisboa 1700‐066, Portugal; 1 [email protected], Laboratório (I.R.F.); Nacional [email protected] de Engenharia (E.V.P.) Civil, Av. Brasil 101, Lisboa 1700-066, Portugal; 2 [email protected] de Química, (I.R.F.);Universidade [email protected] do Minho, (E.V.P.) Campus de Gualtar, Braga 4710‐057, Portugal; 2 [email protected] de Química, Universidade do Minho, Campus de Gualtar, Braga 4710-057, Portugal; * Correspondence:[email protected] [email protected] or [email protected]; Tel.: +351‐218‐443‐634 or +351‐966‐430‐142 * Correspondence: rmfi[email protected] or rita@figueira.pt; Tel.: +351-218-443-634 or +351-966-430-142 Academic Editor: Naba K. Dutta Received:Academic 17 Editor: December Naba 2015; K. Dutta Accepted: 11 March 2016; Published: March 2016 Received: 17 December 2015; Accepted: 11 March 2016; Published: 16 March 2016 Abstract: CorrosionCorrosion degradation degradation of of materials materials and and metallic metallic structures structures is one is one of the of major the major issues issues that givethat giverise riseto depreciation to depreciation of assets, of assets, causing causing great great financial financial outlays outlays in in their their recovery recovery and and or prevention.
  • Reconditioning of Aluminium Engines Reconditioning of Aluminium Engine Blocks Impressum

    Reconditioning of Aluminium Engines Reconditioning of Aluminium Engine Blocks Impressum

    Service Tips & Information Reconditioning of Aluminium Engines Reconditioning of Aluminium Engine Blocks Impressum MSI Motor Service International. Und was dahinter steckt. Die MSI Motor Service International GmbH ist die Vertriebsorganisation für die weltweiten Aftermarket-Aktivitäten der KOLBENSCHMIDT PIERBURG AG. Unter den Premium-Marken KOLBEN- SCHMIDT, PIERBURG und TRW liefern wir ein umfassendes, bedarfsgerech- tes Sortiment von Produkten im und am Motor. Den Werkstätten und Moto- reninstandsetzern stehen Motorkom- ponenten für über 2000 verschiedene Motoren zur Verfügung. Alle Produkte erfüllen den hohen Anspruch an Qualität, Wirtschaftlich- keit und Umweltschutz. Die KOLBENSCHMIDT PIERBURG AG als weltweit bedeutender Automobilzuliefe- rer entwickelt innovative Lösungen für Komponenten, Module und Systeme rund um den Motor für fast alle Hersteller. An 23 Fertigungsstandorten in Europa, Nord-und Südamerika sowie in China werden 11400 Mitarbeiter beschäftigt. Date 08.06 1. Edition Artikel-Nr. 50 003 804-02 ISBN 978-3-86522-197-1 Published by: © MSI Motor Service International GmbH Untere Neckarstraße 74172 Neckarsulm, Germany Editors: Alexander Schäfer Uwe Schilling Simon Schnaibel Technical Contributors: Reiner Holwein Johann Szopa Bernd Waldhauer Ullrich Zucker Dr. Eduard Köhler Willi Pröschle Graphical design: Uwe Schilling Simon Schnaibel Production: Margot Schneider Hela Werbung GmbH, Heilbronn Wir bedanken uns für die freundliche Unterstützung der KS Aluminium Technologie AG. This document must not be reprinted, duplicated or translated in full or in part without our prior written con- sent and without reference to the source of the material. All content including pictures and diagrams is subject to alteration. We accept no liability. 2 | Reconditioning of Aluminium Engine Blocks MSI Motor Service International Reconditioning of Aluminium Engine Blocks FOREWORD Aluminium engine blocks – the trend Since they were fi rst introduced, engines with aluminium engine blocks have continued to enjoy increasing popularity.
  • Joining of AI-B4C Metal Matrix Composites by Laser Welding and Friction Stir Welding

    Joining of AI-B4C Metal Matrix Composites by Laser Welding and Friction Stir Welding

    Joining of AI-B4C Metal Matrix Composites by Laser Welding and Friction Stir Welding Dissertation Presented in Partial Fulfillment of the Requirement for the Degree of Doctor of Philosophy By Junfeng Guo UNIVERSITE DU QUEBEC A CHICOUTIMI 2012 Director: X. Grant Chen (UQAC) Co-director: Patrick Gougeon (NRC-ATC) Abstract AI-B4C MMCs are important materials as neutron absorber in spent nuclear fuel storage and transportation due to their high boron (10B) concentration and thus high neutron absorption capability. However, wide application of these materials is still limited due to the lack of suitable joining techniques to fully take advantage of the materials. Problems such as porosity and chemical reaction between Al matrix and B4C particles can arise during fusion welding of the material. Therefore, the present study is intended to find effective and reliable welding techniques for AI-B4C MMCs. The weldability of AA1100- 16%B4C (particle size: 11 pirn) and AA1100-30%B4C MMCs (median particle size: 15 pirn) was evaluated using laser welding and friction stir welding. In comparison with conventional arc welding techniques, the deep and narrow fusion zones associated with laser welding can result in smaller heat affected zones, and thus less thermal distortion and mechanical property degradation. On the other hand, friction stir welding, as a solid state process, seems promising as it can avoid various problems that may otherwise be encountered during fusion welding of MMCs. For laser welding without filler, it was found that most B4C particles were decomposed during welding leading to formation of needle-like AIB2 and AI3BC phases in the weld.
  • Aluminium Alloys Chemical Composition Pdf

    Aluminium Alloys Chemical Composition Pdf

    Aluminium alloys chemical composition pdf Continue Alloy in which aluminum is the predominant lye frame of aluminum welded aluminium alloy, manufactured in 1990. Aluminum alloys (or aluminium alloys; see spelling differences) are alloys in which aluminium (Al) is the predominant metal. Typical alloy elements are copper, magnesium, manganese, silicon, tin and zinc. There are two main classifications, namely casting alloys and forged alloys, both further subdivided into heat-treatable and heat-free categories. Approximately 85% of aluminium is used for forged products, e.g. laminated plates, foils and extrusions. Aluminum cast alloys produce cost-effective products due to their low melting point, although they generally have lower tensile strength than forged alloys. The most important cast aluminium alloy system is Al–Si, where high silicon levels (4.0–13%) contributes to giving good casting features. Aluminum alloys are widely used in engineering structures and components where a low weight or corrosion resistance is required. [1] Alloys composed mostly of aluminium have been very important in aerospace production since the introduction of metal leather aircraft. Aluminum-magnesium alloys are both lighter than other aluminium alloys and much less flammable than other alloys containing a very high percentage of magnesium. [2] Aluminum alloy surfaces will develop a white layer, protective of aluminum oxide, if not protected by proper anodization and/or dyeing procedures. In a wet environment, galvanic corrosion can occur when an aluminum alloy is placed in electrical contact with other metals with a more positive corrosion potential than aluminum, and an electrolyte is present that allows the exchange of ions.