Hot deformation behavior of Cu-bearing antibacterial titanium alloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第10期
论文作者：Zheng Ma Ling Ren M.Babar Shahzad Rui Liu Ying Zhao Ke Yang
文章页码：1867 - 1875
摘 要：We investigated the deformation behavior of a new biomedical Cu-bearing titanium alloy（Ti-645（Ti-6.06 A1-3.75 V-4.85 Cu, in wt%）） to optimize its microstructure control and the hot-working process. The results showed that true stress-true strain curve of Ti-645 alloy was susceptible to both deformation temperature and strain rate. The microstructure of Ti-645 alloy was significantly changed from equiaxed grain to acicular one with the deformation temperature while a notable decrease in grain size was recorded as well. Dynamic recovery（DRV） and dynamic recrystallization（DRX） obviously existed during the thermal compression of Ti-645 alloy. The apparent activation energies in（α+β） phase and β single phase regions were calculated to be 495.21 kJ mol-1 and 195.69 kJ mol-1, respectively. The processing map showed that the alloy had a large hot-working region whereas the optimum window occurred in the strain rate range of 0.001-0.1 s-1, and temperature range of 900-960℃ and 1000-1050℃. The obtained results could provide a technological basis for the design of hot working procedure of Ti-645 alloy to optimize the material design and widen the potential application of Ti-645 alloy in clinic.
Zheng Ma1,2，Ling Ren1，M.Babar Shahzad1，Rui Liu1，Ying Zhao2，Ke Yang1
1. Institute of Metal Research, Chinese Academy of Sciences2. Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Science
摘 要：We investigated the deformation behavior of a new biomedical Cu-bearing titanium alloy（Ti-645（Ti-6.06 A1-3.75 V-4.85 Cu, in wt%）） to optimize its microstructure control and the hot-working process. The results showed that true stress-true strain curve of Ti-645 alloy was susceptible to both deformation temperature and strain rate. The microstructure of Ti-645 alloy was significantly changed from equiaxed grain to acicular one with the deformation temperature while a notable decrease in grain size was recorded as well. Dynamic recovery（DRV） and dynamic recrystallization（DRX） obviously existed during the thermal compression of Ti-645 alloy. The apparent activation energies in（α+β） phase and β single phase regions were calculated to be 495.21 kJ mol-1 and 195.69 kJ mol-1, respectively. The processing map showed that the alloy had a large hot-working region whereas the optimum window occurred in the strain rate range of 0.001-0.1 s-1, and temperature range of 900-960℃ and 1000-1050℃. The obtained results could provide a technological basis for the design of hot working procedure of Ti-645 alloy to optimize the material design and widen the potential application of Ti-645 alloy in clinic.
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