This work focuses on optimizing the sintering process of Ti-6Al-4V using Al-V master alloy powder to achieve a cost efficient product with acceptable mechanical properties. Reference was also made to Ti-6Al-4V products produced by Clinning (University of Cape Town 2012) using elemental Al and V instead of the master alloy addition proposed in this work. Commercially pure titanium (CP-Ti, Alfa Aesar) was used in this study as a reference, since its behavior during processing is more predictable. Relative density and the microstructural feature were studied in-depth in order to understand their impact on mechanical properties. The two starting materials were sintered under vacuum (approximately 10-5 mbar) at 1000⁰C (6hrs), 1100⁰C (2, 4, 6hrs), 1200⁰C (1, 2, 4hrs) and 1300⁰C (1, 2hrs). Relative density, microstructure analysis and mechanical property measurements characterized on the as-sintered material before specimens were hot deformed at 800⁰C to 0.69 strain and subsequently annealed at 870⁰C for 1hr. Similar measurements and analyses were conducted on the samples post deformation and annealing.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uct/oai:localhost:11427/20098 |
| Date | January 2015 |
| Creators | Qangule, Lwazi |
| Contributors | Knutsen, Robert D |
| Publisher | University of Cape Town, Faculty of Engineering and the Built Environment, Centre for Materials Engineering |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Master Thesis, Masters, MSc (Eng) |
| Format | application/pdf |
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