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The Study of Intermetallic Particles in Aluminium Alloy AA3104 Can-Body Stock During Homogenisation

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The Study of Intermetallic Particles in Aluminium Alloy AA3104 Can-Body Stock During Homogenisation University of Cape Town Submitted is partial fulfilment of the requirements for the master’s degree Masters Dissertation The study of intermetallic particles in aluminiumTown alloy AA3104 can- body stock during homogenisation Cape Livhuwaniof Tessa Magidi Supervisor: Dr Sarah L. George Co-supervisor: Prof Robert D. Knutsen March 2017 University The copyright of this thesis vests in the author. No quotation from it or information derived from it is to be published without full acknowledgement of the source. The thesis is to be used for private study or non- commercial research purposes only. Published by the University of Cape Town (UCT) in terms of the non-exclusive license granted to UCT by the author. University of Cape Town PLAGARISM DECLARATION 1. "I know the meaning of plagiarism and declare that all the work in the document, save for that which is properly acknowledged, is my own. This thesis/dissertation has been submitted to the Turnitin module (or equivalent similarity and originality checking software) and I confirm that my supervisor has seen my report and any concerns revealed by such have been resolved with my supervisor." 2. Each significant contribution to, and quotation in, this project from the work, or works of other people has been attributed and has cited and referenced. 3. This project is my own work. 4. I have not allowed, and will not allow, anyone to copy my work with the intention of passing it off as his or her own work. 5. I acknowledge that copying someone else's assignment or project, or part of it, is wrong, and declare that this is my own work. Livhuwani Tessa Magidi SIGNATURE: DATE: 12 March 2017 EBE Faculty: Assessment of Ethics in Research Projects (Rev2) Any person planning to undertake research in the Faculty of Engineering and the Built Environment at the University of I Cape Town is required to complete this form before collecting or analysing data. When completed it should be submitted to the supervisor (where applicable) and from there to the Head of Department. If any of the questions below have been answered YES, and the applicant is NOT a fourth year student, the Head should forward this form for approval by the Faculty EIR committee: submit to Ms Zulpha Geyer ([email protected]; Chem Eng Building, Ph 021 650 4791 ). NB: A copy of this signed form must be included with the thesis/dissertation/report when it is submitted for examination This form must only be completed once the most recent revision EBE EiR Handbook has been read. Name of Principal Researcher/Student: Li\J·H1.n,.JA~I l"\ACrlOi Department: t\&0-IA N ICflL.- GNG-lN6~~lN 0 · \' 00 c_.. c.t""~a · -z. Q Preferred email address of the applicant: <""'tjd 1-.i 3.-~ <"'j U t If a Student: Degree: t'\1(5"1£;{(.S iN. J"\A1E-~IAI-S Supervisor: D.- SA~,:?H- GfOP-G-G \:-NG-INf;t~l NG- If a Research Contract indicate source of funding/sponsorship: Research Project Title: l-iOMO(-.( NI Sr-t I ION OF Overview of ethics issues in our research ro·ect: Question 1: Is there a possibility that your research could cause harm to a third party (i.e. YES a erson not involved in our pro·ect ? Question 2: Is your research making use of human subjects as sources of data? YES If our answer is YES, lease com lete Addendum 2. Question 3: Does your research involve the participation of or provision of services to communities? YES If our answer is YES, lease com lete Addendum 3. Question 4: If your research is sponsored, is there any potential for conflicts of interest? YES If our answer is YES, lease com lete Addendum 4. If you have answered YES to any of the above questions, please append a copy of your research proposal, as well as any interview schedules or questionnaires (Addendum 1) and please complete further addenda as appropriate. Ensure that you refer to the EiR Handbook to assist you in completing the documentation requirements for this form. I hereby undertake to carry out my research in such a way that • there is no apparent legal objection to the nature or the method of research; and • the research will not compromise staff or students or the other responsibilities of the University; • the stated objective will be achieved, and the findings will have a high degree of validity; • limitations and alternative interpretations will be considered; • the findings could be subject to peer review and publicly available; and • I will comply with the conventions of copyright and avoid any practice that would constitute plagiarism. Si Date Principal Researcher/Student: oG/ OG /d-013 HOD (or delegated nominee): Final authority for all assessments with NO to all questions and for all undergraduate research. Chair: Faculty EIR Committee For applicants other than undergraduate students who have answered YES to any of the above uestions. ACKNOWLEDGEMENTS I would like to express my sincere thanks to God the Almighty and to the following people: Dr Sarah George my supervisor for the help, the guidance and equipment use around the lab when conducting my research Professor Robert Knutsen for the advice and further guidance on how to approach my research The staff and students of the Centre of Materials Engineering (CME) for the encouragement and help around the lab Penny Park- Ross for the assistance in the lab with regards to our project needs and more Velile Vilane for the help on equipment use around the (CME) lab Peter Dobias from the Department of Chemical Engineering workshop for designing and making the autoclave (pressure vessel) used in this research Tracy Booysen from the Department of Mechanical Engineering for coding a MATLAB script used in image analysis Nico Fischer and Kirsten Corin from the Department of Chemical Engineering for X-ray diffraction (XRD) conduction and analysis, respectively Dr Hong Su from the Department of Chemistry for XRD conduction Mudindivhathu Tshivhombela from the Department of Mechanical Engineering for designing and making the gas purifier used in this research Miranda Waldron and Dr Innocent Shuro from the Centre for Imaging and Analysis The Department of Mechanical Engineering workshop for the mechanical support Kumar Sundaram from the University of Oxford for guidance on how to adapt the SiBut method (particle extraction process) Tim Low from the Education Development Unit for the statistical help My family for the support and encouragement UCT Carnegie Scholarship for women in Science and Engineering for sponsoring my studies and giving me the opportunity to study further And Hulamin for supplying the samples and the project as well as financial support (It has been an honour working on this project) i CONTENTS PLAGARISM DECLARATION ............................................................. 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ACKNOWLEDGEMENTS .................................................................................................................... i LIST OF FIGURES .............................................................................................................................. vi LIST OF TABLES ................................................................................................................................. x LIST OF EQUATIONS ....................................................................................................................... xii ABSTRACT ........................................................................................................................................ xiii 1 INTRODUCTION .......................................................................................................................... 1 1.1 Background and motivation to the investigation .............................................................. 1 1.2 Objectives of the report ....................................................................................................... 2 1.3 Methodology .......................................................................................................................... 2 1.4 Scope and limitations of the investigation ........................................................................ 3 1.5 Plan of development ............................................................................................................ 3 2 LITERATURE REVIEW ............................................................................................................... 4 2.1 Material .................................................................................................................................. 4 2.1.1 Pure aluminium ............................................................................................................. 4 2.1.2 Aluminium alloy AA3104 ............................................................................................. 6 2.2 Industrial can-body sheet and can making process ...................................................... 11 2.2.1 Industrial can-body sheet making processes ......................................................... 11 2.2.2 Industrial can making process .................................................................................. 12 2.2.3 Galling resistance ....................................................................................................... 13 2.2.4 Particle stimulated nucleation ................................................................................... 15 2.3 As-cast microstructure ....................................................................................................... 16 2.4 Homogenised microstructure...........................................................................................
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