CUMULATIVE INDEX September 1952 Through December 2017
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Connor Final Highlighted
Preliminary Development of a PPAM Actuated Pediatric Prosthetic Ankle Connor McNamara-Spackman A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science (Bioengineering) at the University of Otago, Dunedin, New Zealand. February 2021 Abstract The purpose of this research was to develop a preliminary design of a powered pediatric prosthetic ankle. Previous research identified the health risk of improper gait cycle and the lack of powered prosthetic ankle options for children. Costs for powered prosthetic ankles are too high (upwards of $5000 NZD), the sizes are too large and the weight is too significant for a child to benefit from. Current technologies for ankle joint actuation and materials for the prosthetic structure were evaluated and a conclusion of utilizing PPAMs was chosen due to their ability to generate the required 300 N of contraction force. CAD was used to model the structure of a prosthetic ankle and evaluate the FOS of the different material combinations while under static loading and fatigue simulations. HDPE and UHMWPE failed to withstand the simulations, while the aluminium alloy and stainless steel showed minimal faults from the simulations. MatLab was used to simulate the desired PPAM dimensions of 100 mm to determine the contraction force and contraction percentage that can be generated by the PPAM. The smallest PPAM found in research was 110 mm and showed promising results from their mathematical modeling. The overall height of the prosthetic was no greater than 110 mm and the membrane length of the PPAM was no greater than 100 mm, while successfully producing more than 300 N during contraction. -
Alcotec Aluminum Technical Guide
AlcoTec Aluminum Technical Guide Contents AlcoTec Aluminum Wire & Equipment Technical Guide Table of Contents AlcoTec Aluminum Wire & Equipment Technical Guide ......................................................................................................... 1 Table of Contents ................................................................................................................................................................ 1 Environmental Health and Safety ......................................................................................................................................... 3 Technical Services Heat Treatable & Non-Heat Treatable Base & Fillers ............................................................................................................. 6 Filler Alloys: Chemical Composition Limits & Physical Properties ......................................................................................... 7 Conversion Factors ............................................................................................................................................................ 7 Welded Joint Strength ......................................................................................................................................................... 8 Typical Tensile Properties - Groove Welds ............................................................................................................................ 9 Weld Profiles ..................................................................................................................................................................... -
Characteristics of Al-Si Alloys with High Melting Point Elements for High Pressure Die Casting
materials Article Characteristics of Al-Si Alloys with High Melting Point Elements for High Pressure Die Casting Tomasz Szymczak 1,* , Grzegorz Gumienny 1,* , Leszek Klimek 2 , Marcin Goły 3 , Jan Szymszal 4 and Tadeusz Pacyniak 1 1 Department of Materials Engineering and Production Systems, Lodz University of Technology, 90-924 Lodz, Poland; [email protected] 2 Institute of Materials Science and Engineering, Lodz University of Technology, 90-924 Lodz, Poland; [email protected] 3 Department of Physical & Powder Metallurgy, AGH University of Science and Technology, 30-059 Krakow, Poland; [email protected] 4 Department of Technical Sciences and Management, University of Occupational Safety Management in Katowice, 40-007 Katowice, Poland; [email protected] * Correspondence: [email protected] (T.S.); [email protected] (G.G.); Tel.: +48-426312276 (T.S.); +48-426312264 (G.G.) Received: 9 October 2020; Accepted: 29 October 2020; Published: 29 October 2020 Abstract: This paper is devoted to the possibility of increasing the mechanical properties (tensile strength, yield strength, elongation and hardness) of high pressure die casting (HPDC) hypoeutectic Al-Si alloys by high melting point elements: chromium, molybdenum, vanadium and tungsten. EN AC-46000 alloy was used as a base alloy. The paper presents the effect of Cr, Mo, V and W on the crystallization process and the microstructure of HPDC aluminum alloy as well as an alloy from the shell mold. Thermal and derivative analysis was used to study the crystallization process. The possibility of increasing the mechanical properties of HPDC hypoeutectic alloy by addition of high-melting point elements has been demonstrated. -
Tribological Behaviours Influenced by Surface Coatings and Morphology
University of Windsor Scholarship at UWindsor Electronic Theses and Dissertations Theses, Dissertations, and Major Papers 7-11-2015 Tribological Behaviours Influenced yb Surface Coatings and Morphology Guang Wang University of Windsor Follow this and additional works at: https://scholar.uwindsor.ca/etd Recommended Citation Wang, Guang, "Tribological Behaviours Influenced yb Surface Coatings and Morphology" (2015). Electronic Theses and Dissertations. 5305. https://scholar.uwindsor.ca/etd/5305 This online database contains the full-text of PhD dissertations and Masters’ theses of University of Windsor students from 1954 forward. These documents are made available for personal study and research purposes only, in accordance with the Canadian Copyright Act and the Creative Commons license—CC BY-NC-ND (Attribution, Non-Commercial, No Derivative Works). Under this license, works must always be attributed to the copyright holder (original author), cannot be used for any commercial purposes, and may not be altered. Any other use would require the permission of the copyright holder. Students may inquire about withdrawing their dissertation and/or thesis from this database. For additional inquiries, please contact the repository administrator via email ([email protected]) or by telephone at 519-253-3000ext. 3208. Tribological Behaviours Influenced by Surface Coatings and Morphology By Guang Wang A thesis Submitted to the Faculty of Graduate Studies through the Department of Mechanical, Automotive & Materials Engineering in Partial Fulfillment of the Requirements for the Degree of Master of Applied Science at the University of Windsor Windsor, Ontario, Canada 2015 ©2015 Guang Wang Tribological Behaviours Influenced by Surface Coatings and Morphology By Guang Wang APPROVED BY: Dr. -
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. -
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. -
Brazing Compilation of Literature References from 1973 to 1978
OCTOBER 1979 BRAZING COMPILATION OF LITERATURE REFERENCES FROM 1973 TO 1978. BY J.C. RÖMER N et hf^rlfi rids E norqy R o soa re h \ oundation ECN does not assume any liability with respect to the use of, or for damages resulting from the use of any information, apparatus, method or process disclosed in this document. Netherlands Energy Research Foundation ECN P.O. Box 1 1755 ZG Petf.n(NH) The Netherlands Telephone (0)2246 - 62».. Telex 57211 ECN-7* OCTOBER 1979 BRAZING COMPILATION OF LITERATURE REFERENCES FROM 1973 T01978. BY J.C. ROMER -2- ABSTRACT This report is a compilation of published literature on high temperature brazing covering the period 1973-1978. The references are listed alphabetically with regard to the base material or combination of base materials to be brazed. Trade names are treated as base materials. The report contains approximately 1500 references, of which 300 are to patents. KEYWORDS BRAZING BRAZING ALLOYS FILLER METALS JOINING - 3 CONTENTS ABSTRACT 1. ALUMINIUM 2. ALUMINIUM (FLVXLESS) 3. ALUMINIUM - BERYLLIUM 4. ALUMINIUM/BORON COMPOSITES 5. ALUMINIUM - COPPER 5.1. Aluminium - graphite 5.2. Aluminium - nickel alloys 5.3. Aluminium - niobium 5.4. Aluminium ~ molyldenum 5.5. Aluminium - stainless steel 5.6. Aluminium - steels 5.7. Aluminium - tantalum 5.8. Aluminium - titanium 5.9. Aluminium - tungsten 6. BERYLLIUM 7. BORONNITRIDE• 8. BRASS 8.1. Brass - aluminium 8.2. Brass - steels 9. BRONZE 9.1. Bronze - stainless steels 10. CERAMICS 10.1. Ceramics - metal - 4 - CERMETS 61 11.1. Cermets - stainless steels 62 COBALT 63 COPPER ALLOYS 64 13.1. Copper alloys - brass 68 13.2. -
Abstracts from the Scientific and Technical Press Titles And
December, ig4j Abstracts from the Scientific and Technical Press " (No. 117. October, 1943) AND Titles and References of Articles and Papers Selected from Publications (Reviewed by R.T.P.3) TOGETHER WITH List of Selected Translations (No. 63)' London : "THE ROYAL AERONAUTICAL SOCIETY" with which is incorporated "The Institution of Aeronautical Engineers" 4, Hamilton Place, W.I Telephone: Grosvenor 3515 (3 lines) ABSTRACTS FROM THE SCIENTIFIC AND TECHNICAL PRESS. Issued by the Directorate's of Scientific Research and Technical Development, Ministry of Air craft Production. (Prepared by R.T.P.3.) No. 117. OCTOBER, 1943. Notices and abstracts from the Scientific and Technical Press are prepared primarily for_ the information of Scientific and Technical Staffs. Particular attention is paid to the work carried out in foreign countries, on the assumption that the more accessible British work (for example that published by the Aeronautical Research Committee^ is already known to these Staffs. Requests from scientific and technical staffs for further information of transla tions should be addressed to R.T,P.3, Ministry of Aircraft Production, and not to the Royal Aeronautical Society. Only a limited number of the articles quoted from foreign journals are trans lated and usually only the original can be supplied on loan. If, however, translation is required, application should be made in writing to R.T.P.3, the requests being considered in accordance with existing facilities. ' NOTE.—As far as possible, the country of origin quoted in the items refers to the original source. The Effect of Nitrogen on the Properties of Certain Austenitic Valve Steels. -
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. -
Annual Report of the Director of the Mint
- S. Luriºus vsº ANNUAL REPORT Of the Director of the N/int for the fiscal year ended June 30, 1970. ANNUAL REPORT of the Director of the Mint for the fiscal year ended June 30 1970 DEPARTMENT OF THE TREASURY DOCUMENT NO. 3253 Director of the Mint U.S. GOVERNMENT PRINTING OFFICE WASHINGTON : 1971 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price $1 (paper cover) Stock Number 4805–0009 LETTER OF TRANSMITTAL DEPARTMENT OF THE TREASURY, BUREAU OF THE MINT, Washington, D.C., April 29, 1971. SIR: I have the honor to submit the Ninety-eighth Annual Report of the Director of the Mint, since the Mint became a Bureau within the Department of the Treasury in 1873. Annual reports of Mint activities have been made to the Secretary of the Treasury since 1835, pursuant to the act of March 3, 1835 (4 Stat. 774). Annual reports of the Mint have been made since it was established in 1792. This report is submitted in compliance with Section 345 of the Revised Statutes of the United States, 2d Edition (1878), 31 U.S.C. 253. It includes a review of the operations of the mints, assay offices, and the bullion depositories for the fiscal year ended June 30, 1970. Also contained in this edition are reports for the calendar year 1969 on U.S. gold, silver, and coinage metal production and the world's monetary stocks of gold, silver, and coins. MARY BROOKs, Director of the Mint. Hon. JoHN B. Con NALLY, Secretary of the Treasury. -
Table of Contents
Table of Contents Committees Preface Symposium A: Invited Lectures New Perspectives for Wrought Magnesium Alloys J. Bohlen, D. Letzig and K.U. Kainer 1 Automotive Mg Research and Development in North America J.A. Carpenter, J. Jackman, N.Y. Li, R.J. Osborne, B.R. Powell and P.S. Sklad 11 State of the Art in the Refining and Recycling of Magnesium L.F. Zhang and T. Dupont 25 Research and Development of Processing Technologies for Wrought Magnesium Alloys F.S. Pan, M.B. Yang, Y.L. Ma and G.S. Cole 37 Overview of CAST and Australian Magnesium Research D.H. StJohn 49 Development of Magnesium Alloys with High Performance S. Kamado and Y. Kojima 55 Symposium B: Cast Magnesium Alloys and Foundry Technologies Effects of Microstructure and Partial Melting on Tensile Properties of AZ91 Magnesium Cast Alloy T.P. Zhu, Z.W. Chen and W. Gao 65 Effect of Heat Treatment on the Microstructure and Creep Behavior of Mg-Sn-Ca Alloys T.A. Leil, Y.D. Huang, H. Dieringa, N. Hort, K.U. Kainer, J. Buršík, Y. Jirásková and K.P. Rao 69 Creep Behaviour and Microstructure of Magnesium Die Cast Alloys AZ91 and AE42 K. Wei, L.Y. Wei and R. Warren 73 Growth Rate of Small Fatigue Cracks of Cast Magnesium Alloy at Different Conditions X.S. Wang and J.H. Fan 77 A Cyclic Stress-Strain Constitutive Model for Polycrystalline Magnesium Alloy and its Application X.G. Zeng, Q.Y. Wang, J.H. Fan, Z.H. Gao and X.H. Peng 81 Dynamic Stress-Strain Behavior of AZ91 Alloy at High-Strain Rate G.Y. -
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.