Journal article
Influence of ageing temperature and heating rate on the properties and microstructure of β Ti alloy, Ti–6Cr–5Mo–5V–4Al
Materials Science & Engineering A, Vol.531, pp.98-106
2012
Abstract
A study of the effects of temperature and heating rate upon the ageing response of a Ti-6Cr-5Mo-5V-4Al alloy was undertaken. The degree of strengthening declined with increasing ageing temperature as the precipitate morphologies became coarser, while the extent and thickness of grain boundary α increased with temperature. Ageing at temperatures between 440 °C and 500 °C result in the greatest age hardening response in times of around 4 h due precipitation of the α phase. At 440 °C the hardness increases from the initial solution treated value of 275 HV to more than 450 HV. The rate of heating to reach the isothermal ageing temperature has a substantial impact on the ageing response. Greater scatter was observed in hardness results for the samples aged using a faster heating rate at 500 °C. For ageing at 560 °C a faster rate of heating to the ageing temperature led to rapid declines in the hardness after the peak, equivalent to around 20% of the peak value. Slower heating rates (5 °C min-1) appear to increase the number of nucleation sites for precipitation of the α phase, forming finer, more even distributions of precipitates. Faster heating rates (∼100 °C min-1) produce coarser, less evenly distributed precipitates which coarsen more rapidly.
Details
- Title
- Influence of ageing temperature and heating rate on the properties and microstructure of β Ti alloy, Ti–6Cr–5Mo–5V–4Al
- Authors
- Damon Kent (Author) - University of QueenslandG Wang (Author) - University of QueenslandW Wang (Author) - BaoTi Group Ltd., ChinaM S Dargusch (Author) - University of Queensland
- Publication details
- Materials Science & Engineering A, Vol.531, pp.98-106
- Publisher
- Elsevier BV
- Date published
- 2012
- DOI
- 10.1016/j.msea.2011.10.040
- ISSN
- 0921-5093
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99447753302621
- Output Type
- Journal article
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Nanoscience & Nanotechnology