On Mechanical Properties of Aluminum Alloys
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The Influence of Age Hardening and Shot Peening on the Surface
materials Article The Influence of Age Hardening and Shot Peening on the Surface Properties of 7075 Aluminium Alloy Sebastjan Žagar 1, Boštjan Markoli 2, Iztok Nagliˇc 2 and Roman Šturm 1,* 1 Faculty of Mechanical Engineering, Aškerˇceva6, 1000 Ljubljana, Slovenia; [email protected] 2 Faculty of Natural Sciences and Engineering, Aškerˇceva12, 1000 Ljubljana, Slovenia; [email protected] (B.M.); [email protected] (I.N.) * Correspondence: [email protected]; Tel.: +386-14-771-203 Abstract: The present study investigates the effect of shot peening (SP) on the mechanical properties and surface roughness of 7075 aluminum alloy during different stages and conditions of heat treatment. The mechanical properties were determined by measuring Vickers microhardness profiles and residual stress profiles, while the amount of alloying elements present in the solid solution of the samples under different heat treatment conditions was determined by measuring the electrical conductivity. The results show that the increase in microhardness near the SP surface and the maximum compressive residual stresses are mainly related to the content of alloying elements in the solid solution. Surface roughness increases with increasing SP Almen intensity, and samples with the highest microhardness and residual stresses have the lowest surface roughness. Keywords: aluminum alloy 7075; shot peening; microhardness; residual stresses; surface roughness Citation: Žagar, S.; Markoli, B.; Nagliˇc,I.; Šturm, R. The Influence of 1. Introduction Age Hardening and Shot Peening on Aluminum alloy 7075 is widely used in automotive and aerospace industries due to its the Surface Properties of 7075 high strength and light weight [1]. -
A Study of Process Parameters of Friction Stir Welded Aa 6061 Aluminum Alloy
ISSN: 2319-8753 International Journal of Innovative Research in Science, Engineering and Technology Vol. 2, Issue 6, June 2013 A STUDY OF PROCESS PARAMETERS OF FRICTION STIR WELDED AA 6061 ALUMINUM ALLOY Prashant Prakash1, Sanjay Kumar Jha2, Shree Prakash Lal3 Department of Production Engineering, B.I.T Mesra , Patna Campus, India 1 ,3 Department of Production Engineering, B.I.T Mesra , Ranchi , India 2 Abstract: Friction stir welding (FSW) is a relatively new solid-state joining process. This joining technique is energy efficient, environment friendly, and versatile. The principal advantages are low distortion, absence of melt related defects and high joint strength. In FSW parameters play an important role like tool design and material, tool rotational speed, welding speed and axial force. The paper focuses on process parameters that in required for producing effective friction stir welding joint. Keywords: Friction Stir welding, 6061 aluminum alloy, tool rotational speed, welding speed, tensile strength. I. INTRODUCTION Aluminium alloys with a wide range of properties. Among all aluminum alloys, AA 6061 alloy plays major role in the aerospace industry in which magnesium and silicon (0.3-1.5 w%, Si, Mg) are the principal alloying elements [9]. It is widely used in the aerospace applications because it has good formability, weldability, machinabilty, corrosion resistance, and good strength compared to other aluminum alloys. Aluminum alloys are generally classified as non-weldable because of the poor solidification microstructure and porosity in the fusion zone. Also, the loss in mechanical properties as compared to the base material is very significant. These factors make the joining of these alloys by conventional welding processes unattractive. -
Surface Deformation and Rebound for Normal Single-Particle Collisions in a Surrounding fluid
J. Fluid Mech. (2019), vol. 871, pp. 1044–1066. c Cambridge University Press 2019 1044 doi:10.1017/jfm.2019.349 Surface deformation and rebound for normal single-particle collisions in a surrounding fluid https://doi.org/10.1017/jfm.2019.349 . Angel Ruiz-Angulo1, Shahrzad Roshankhah2 and Melany L. Hunt2,† 1Icelandic Meteorological Office, 108 Reykjavík, Iceland 2Division of Engineering and Applied Science, California Institute of Technology, 1200 E. California Blvd., MC 104-44, Pasadena, CA 91125, USA (Received 21 December 2018; revised 4 March 2019; accepted 23 April 2019; first published online 3 June 2019) This article presents experimental measurements involving immersed collisions https://www.cambridge.org/core/terms between a rigid impactor and a deformable target for a wide range of Reynolds and Stokes numbers. Three aluminium alloys are used as solid targets submerged in seven different fluids covering a wide range of viscosity and density. The collision and rebound velocities as well as the depth and diameter of the crater produced by the collisions are measured with high resolution. Most of the experiments in this study occur at velocities for which the deformation is within the elastic–plastic regime. Results of the experiments in air are analysed by elastic, plastic and elastic–plastic theories, and demonstrate the complexities of modelling elastic–plastic collisions. For collisions in a liquid, the measurements show that the size of the crater is independent of the fluid characteristics if the Stokes number is beyond a critical value. The normal coefficient of restitution can be estimated by including both viscous losses and plasticity effects and assuming that the collision time scale is significantly shorter than the hydrodynamic time scale. -
(11604843) Under the Guidance of Mr. Piyush Gulati Asst. Professor
Evaluating the effects of reinforcement particles on mechanical and metallurgical properties of friction stir processed aluminum alloy composites Dissertation-II Submitted in partial fulfillment of the requirement for the award of degree Of MASTER OF TECHNOLOGY In MECHANICAL ENGINEERING By Kaushal Kumar (11604843) Under the guidance of Mr. Piyush Gulati Asst. Professor SCHOOL OF MECHANICAL ENGINEERING LOVELY PROFESSIONAL UNIVERSITY PUNJAB TOPIC APPROVAL PERFORMA School of Mechanical Engineering Program : P17H::M.Tech. (Design) [Full Time] COURSE CODE: MEC604 REGULAR/BACKLOG: Regular GROUP NUMBER : MERGD0013 Supervisor Name: Piyush Gulati UID:14775 Designation : Assistant Professor Qualification:________________________ Research Experience : ________________________ SR.NO. NAME OF STUDENT REGISTRATION NO BATCH SECTION CONTACT NUMBER 1 Kaushal Kumar 11604843 2016 M1671 8559999054 SPECIALIZATION AREA : Design Supervisor Signature:___________________ PROPOSED TOPIC : Evaluating the effects of reinforcement particles on mechanical and metallurgical properties of friction stir processed aluminum alloy composites Qualitative Assessment of Proposed Topic by PAC Sr.No. Parameter Rating (out of 10) 1 Project Novelty: Potential of the project to create new knowledge 7.50 2 Project Feasibility: Project can be timely carried out in-house with low-cost and available 7.00 resources in the University by the students. 3 Project Academic Inputs: Project topic is relevant and makes extensive use of academic 7.50 inputs in UG program and serves as a culminating effort for core study area of the degree program. 4 Project Supervision: Project supervisor’s is technically competent to guide students, 7.00 resolve any issues, and impart necessary skills. 5 Social Applicability: Project work intends to solve a practical problem. 6.50 6 Future Scope: Project has potential to become basis of future research work, publication 7.50 or patent. -
Mechanical and Tribological Properties of Al7475-Sicp Composites by Stir Casting Method and Wear Rate Modeling Using RSM
Sådhanå (2019) 44:129 Ó Indian Academy of Sciences https://doi.org/10.1007/s12046-019-1105-1Sadhana(0123456789().,-volV)FT3](0123456789().,-volV) Mechanical and tribological properties of Al7475-SiCp composites by stir casting method and wear rate modeling using RSM K SEKAR Department of Mechanical Engineering, National Institute of Technology Calicut, Calicut 673601, India e-mail: [email protected] MS received 21 July 2018; revised 26 December 2018; accepted 7 March 2019; published online 29 April 2019 Abstract. The microstructure, mechanical and wear properties of the Al 7475-SiCp composites and to investigate the effects of SiC micro-particles reinforcement with alloy have been studied. Al 7475-SiCp com- posites have been developed by a stir casting method. The SiCp size in the range of 15–40 lm with weight.% of 0, 5, 10 and 15 were injected in molten Aluminum 7475 alloy in argon gas environment and stirrer using a mechanical method at 450 rpm to ensure uniform distribution of SiC particles. The mechanical properties such as hardness and compressive strength of the composites were found to be gradually improved with the addition of 5–15% SiCp reinforcement. The ultimate tensile and impact strength increased with 10% of SiCp rein- forcement. For modeling the wear rate, the experiments were conducted in Pin-on Disc tribometer at room condition. A three-level central composite design with response surface methodology was used to reduce the experimental conditions and to predict the abrasive response of wear rate through the development of mathe- matical models. The model developed is efficiently predicted the rate of wear at 95% confidence level and the entire model validate with analysis of variance. -
Effect of Volume Fraction (Al2o3) on Tensile Strength of Aluminium 6061 by Varying Stir Casting Furnace Parameters: a Review
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 10 | Oct -2017 www.irjet.net p-ISSN: 2395-0072 Effect of volume fraction (Al2O3) on tensile strength of Aluminium 6061 by varying stir casting furnace parameters: A Review Yogesh Prabhavalkar1, Prof.Dr.A.N.Chapgaon 2 1M.E. Student, Ashokrao Mane Group of Institution Vathar-416112, Maharashtra, India 2Professor, Department of Mechanical Engineering, Ashokrao Mane Group of Institution Vathar-416112, Maharashtra, India ---------------------------------------------------------------------***------------------------------------------------------------------- Abstract - Aluminium metal matrix composites (AMMCs) are potential materials for various applications due to their good physical and mechanical properties. The addition of reinforcements into it improves the stiffness, specific strength, wear, creep and fatigue properties compared to the conventional engineering materials and It was revealed that aluminium with reinforcement of Al2O3 composites have a higher tensile strength than 6061 aluminium alloy with reduced ductility. Fabrication of this metal matrix is done by stir casting technique which is one of the prominent and economical techniques for development and processing of the same. It has been found that with the increase in weight percentage of reinforcement particles in the aluminium metal matrix, the new material exhibits lower wear rate against abrasive wearing. This article is just an assessment of effect of reinforcement (Al2O3)on AMC’s mechanical properties with various process parameters of stir casting process, such as stirrer design and it’s speed, stirring temperature, stirring time (holding time) and concentration of Al2O3 . Keywords - Aluminum metal matrix composites, Stir casting process, 6061 Aluminium alloy; Al2O3 composites; Tensile strength. 1. INTRODUCTION: Metal matrix composites are metals reinforced with other metal, ceramic or organic compounds. -
Mechanical Properties of 7075 Aluminium Matrix Composites Reinforced by Nanometric Silicon Carbide Particulates
Mechanical Properties of 7075 Aluminium Matrix Composites Reinforced by Nanometric Silicon Carbide Particulates By Zheng Ren A thesis submitted for the Degree of Master of Engineering School of Materials Science and Engineering Faculty of Science University of New South Wales September 2007 PLEASE TYPE THE UNIVERSITY OF NEW SOUTH WALES Thesis/Dissertation Sheet Surname or Family name: Ren First name: Zheng Other name/s: Abbreviation for degree as given in the University calendar: ME School: Materials Science and Engineering Faculty: Faculty of Science Title: Mechanical Properties of 7075 Aluminium Matrix Composites Reinforced by Nanometric Silicon Carbide Particulates Abstract 350 words maximum: (PLEASE TYPE) Aluminium composites reinforced by particles have received considerable attention because of their superior mechanical properties over monolithic aluminum matrix. Over the last ten years, nanocomposites with nano-sized reinforcements have become a revolutionary progress for composites because they have different strengthening mechanisms as compared to that in composites with micro-sized reinforcements. Consequently novel properties can be expected from the nanometric particulate reinforced composites. The aim of this project was to fabricate SiC (50nm)/7075 aluminium composites via a modified powder metallurgy and extrusion route. Ageing treatment was used to increase the strength of the composites and mechanical tests, including tensile test and abrasive wear test, were performed. The effects of nanometric silicon carbide particulates to the ageing behaviours and mechanical properties of the composites have been studied by optical metallography, scanning electron microscopy and transmission electron microscopy. It was found that the dispersion of nanometric silicon carbide was not homogeneous, but tended to disperse along grain boundaries. -
DEVELOPMENT and CHARACTERIZATION of Al-3.7%Cu-1.4%Mg ALLOY/PERIWINKLE ASH (Turritella Communis) PARTICULATE COMPOSITES
DEVELOPMENT AND CHARACTERIZATION OF Al-3.7%Cu-1.4%Mg ALLOY/PERIWINKLE ASH (Turritella communis) PARTICULATE COMPOSITES BY MICHEAL NEBOLISA NWABUFOH THE DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING AHMADU BELLO UNIVERSITY, ZARIA JUNE, 2015. DEVELOPMENT AND CHARACTERIZATION OF Al-3.7%Cu-1.4%Mg ALLOY/PERIWINKLE ASH (Turritella communis) PARTICULATE COMPOSITES BY Michael Nebolisa NWABUFOH, B. Eng (Met), E.S.U.T M.Sc/Eng/01731/2010-2011 A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA. IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF A MASTER DEGREE IN METALLURGICAL AND MATERIALS ENGINEERING. DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING, FACULTY OF ENGINEERING AHMADU BELLO UNIVERSITY, ZARIA. NIGERIA. JUNE, 2015 ii Declaration I hereby declare that, this research work titled "Development and Characterization of Al-3.7%Cu-1.4%Mg Alloy/Periwinkle Shell (Turritella communis) Ash Particulate Composites" was carried out by me, and the results of this research were obtained by tests carried out in the laboratory and all quotations are indicated by references. Name of Student Signature Date iii Certification This research work titled "Development and Characterization of Al-3.7%Cu- 1.4%Mg/Periwinkle (Turritella communis) Shell Ash Particulate Composites" by Nwabufoh M. Nebolisa with Registration Number M.Sc/Eng/01731/2010-2011 meets the regulations guiding the Award of Master degree in Metallurgical and Materials Engineering at Ahmadu Bello University, Zaria. ____________________ ________________ Prof. S.B. Hassan Date Chairman, Supervisor committee ____________________ _______________ Prof. G.B. Nyior Date Member, Supervisor committee ____________________ _______________ Prof. S.A. Yaro Date Head of Department _____________________ ________________ Prof. -
1. Introduction 2. Materials and Experimental Procedure Effect Of
Materials Research. 2015; 18(2): 328-333 © 2015 DOI: http://dx.doi.org/10.1590/1516-1439.307414 Effect of Quenching Rate and Pre-strain on the Strain Ageing Behaviors of 7075 Aluminum Alloys Ramazan Kaçara*, Kemal Güleryüzb aTechnology Faculty, Manufacturing Engineering Department, Karabük University, 78050, Yüzüncüyıl, Karabük, Turkey bTechnical Education Faculty, Karabuk University, 78050, Yüzüncüyıl, Karabuk, Turkey Received: July 7, 2014; Revised: March 9, 2015 The mechanical properties of aluminum alloys are strongly dependent on the thermo-mechanical process so, the strain ageing behavior of 7075 Al-alloy was investigated in this study. A set of test pieces was solution heat treated at 480 °C for 2 h, water quenched (SHTWQ) then pre-strained for 8% in tension. The test samples were aged at 140 °C for 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 24, 48, 72 and 96 h in a furnace. The other set of test samples were solution heat treated at 480 °C for 2 h, quenched in sand (SHTSQ) then pre-strained for 8% in tension. They were also aged at 140 °C for same intervals. The effect of strain ageing, on the mechanical properties of Al-alloy, was investigated by mean of hardness, and tensile tests. The results shown that, the quenching rate after solution heat treatment, ageing time and temperature, as well as pre-strain, play a very important role in the precipitation- hardening associated with ageing process of the 7075 Al-alloy. Keywords: static strain ageing, Al-alloys, pre-strain, quenching rate, ageing time 1. Introduction 2. Materials and Experimental Procedure 7000 series aluminum alloys have been widely used for The T6 heat treated commercially available 7075 Al-alloy aeronautical applications due to their desirable mechanical used in this study is a plate with a thickness of 10 mm. -
Mechanical Behavior of Multiple Forged Al 7075 Aluminium Alloy
Acta Polytechnica Hungarica Vol. 11, No. 7, 2014 Mechanical Behavior of Multiple-forged Al 7075 Aluminum Alloy Tareg S. Ben Naser, György Krallics Dept. of Materials Science and Engineering, Budapest University of Technology and Economics, Bertalan Lajos út 7, H-1111 Budapest, Hungary taregnaser@ eik.bme.hu, [email protected] Abstract: The mechanical behavior of any material can be described using several tests, such as, compression tensile, hardness test, etc. In this work, cold and hot compression tests and hardness measurements were utilized. The subject material of this study was the Al 7075 alloy in the initial state (IS) and the multiple forged (MF) state. The cold compression test at room temperature was used to measure the deformation anisotropy on the MF specimen, while the hot compression test results were used as a source data in order to establish the constitutive equation in the wide ranges of working temperature (from 250 to 450°C) and strain rate (from 0.002 to 2 s-1). The homogeneity and structure of the material were evaluated using the Vickers hardness measurements and optical microscopy images. Keywords: 7075 aluminium alloy; multiple forging; constitutive equations; hot compression test, cold compression test 1 Introduction The Al 7075 alloy is a very interesting material because of its mechanical properties, namely, low density, high strength, moderate ductility and toughness. Due to these properties, the alloy is mainly used for highly stressed structural parts. This material has a wide range of applications such as aircraft fittings, gears and shafts, fuse parts, meter shafts and gears, missile parts, regulating valve parts, worm gears, keys and various other parts of commercial aircrafts and aerospace vehicles [1]. -
Masterarbeit
Montanuniversität Leoben – University of Leoben Department Metallurgie – Department of Metallurgy Nichteisenmetallurgie – Nonferrous Metallurgy MASTERARBEIT Thema: Einfluss von Wärmebehandlungen auf das Eigenschaftsprofil von Aluminium-Knetlegierungen der 7xxx-Serie Ersteller: Dominique Alf, Bsc. Betreuer: Dipl.-Ing. Gernot Kolb Ass.Prof. Dipl.-Ing. Dr.mont. Stefan Pogatscher Leoben, Oktober 2015 NICHTEISENMETALLURGIE MONTANUNIVERSITÄT Dominique Alf, Bsc. Oktober 2015 A-8700 LEOBEN Einfluss von Wärmebehandlungen auf das Eigenschaftsprofil von Aluminium-Knetlegierungen der 7xxx-Serie Die AMAG Austria Metall AG, ist der größte österreichische Aluminiumkonzern und Anbieter von Primäraluminium und Aluminiumhalbzeugen. Als Zulieferer für die Automobil- und Luftfahrindustrie wird von der AMAG neben einer sicheren Prozessführung auch eine ständige Weiterentwicklung der bestehenden Werkstoffe gefordert. Um diese Anforderungen erfüllen zu können, ist die AMAG stets bestrebt neue Verfahren und Werkstoffe zu entwickeln. Die Luftfahrlegierung 7075 (AlZnMgCu) gehört zu der Gruppe der aushärtbaren Werkstoffe. Abhängig von dem jeweiligen Auslagerungszustand ergeben sich hohe Festigkeiten, bei mittelmäßigen Dehnungs- und Korrosionswerten (T6) bis hin zu mittelhohen Festigkeiten mit guten Zähigkeits- und Korrosionseigenschaften (T73). Hervorragende Kombinationen der Kennwerte sind mit einer RRA (Retrogression and Reversion)-Behandlung erzielbar. Ziel dieser Arbeit ist es, ein neues thermomechanisches Verfahren – eine Kombination eines Umformschrittes -
Machinability of Al2024, Al6061, and Al5083 Alloys Using Multi-Hole Simultaneous Drilling Approach
Edith Cowan University Research Online ECU Publications Post 2013 2020 Machinability of Al2024, Al6061, and Al5083 alloys using multi- hole simultaneous drilling approach Muhammad Aamir Edith Cowan University Majid Tolouei-Rad Edith Cowan University Khaled GIasin Ana Vafadar Edith Cowan University Follow this and additional works at: https://ro.ecu.edu.au/ecuworkspost2013 Part of the Engineering Commons 10.1016/j.jmrt.2020.07.078 Aamir, M., Tolouei-Rad, M., Giasin, K., & Vafadar, A. (2020). Machinability of Al2024, Al6061, and Al5083 alloys using multi-hole simultaneous drilling approach. Journal of Materials Research and Technology, 9(5), 10991-11002. https://doi.org/10.1016/j.jmrt.2020.07.078 This Journal Article is posted at Research Online. https://ro.ecu.edu.au/ecuworkspost2013/8538 j m a t e r r e s t e c h n o l . 2 0 2 0;9(xx):10991–11002 Available online at www.sciencedirect.com https://www.journals.elsevier.com/journal-of-materials-research-and-technology Original Article Machinability of Al2024, Al6061, and Al5083 alloys using multi-hole simultaneous drilling approach a,∗ a b a Muhammad Aamir , Majid Tolouei-Rad , Khaled Giasin , Ana Vafadar a School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia b School of Mechanical and Design Engineering, University of Portsmouth, Portsmouth PO1 3DJ, UK a r t i c l e i n f o a b s t r a c t Article history: Aluminium alloys are extensively used in different industries due to their good mechani- Received 4 May 2020 cal properties, machinability, low cost and reliable inspection.