标题
作者
作者:Lai, M (Lai, M.); Gao, Y (Gao, Y.)[1 ]; Yuan, B (Yuan, B.); Zhu, M (Zhu, M.)
期刊信息
摘要
Nickel-free Ti-Nb alloys were fabricated by conventional powder metallurgy sintering method. The oxygen content of sintered Ti-Nb alloys were successfully decreased to around 0.8 wt% by putting TiH2 powders aside the samples during the sintering process. For the first time, the phase transformation behaviors of these sintered Ti-Nb alloys were observed by differential scanning calorimetry (DSC) measurement, The relationship between martensitic transformation start temperature (M-s) and mechanical properties, including elastic modulus and recoverable strain, was established by compression tests carried out at room temperature. While M-s was close to test temperature, an obvious drop of elastic modulus was observed, which was related to the "beta-alpha" transformation. In the meantime, a remarkable recoverable strain as high as 5% was obtained at room temperature, which is the highest value reported in sintered Ti-Nb alloys until now. The results of this study reveal that the recoverable strain can be further improved by adjusting M-s close to the service temperature, which was neglected in the reported studies before and will provide some guidance for the future design and fabrication of porous Ni-free Ti-based shape memory alloys for biomedical application. (C) 2015 Elsevier Ltd. All rights reserved,
关键词
作者关键词:Sintered titanium alloy; Superelasticity; Oxygen content; Martensitic transformation; Biomedical alloy
作者信息
通讯作者地址:Gao, Y (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. |
地址:
| [ 1 ] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China |
| [ 2 ] Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China |
电子邮件地址:meygao@scut.edu.cn
出版商
类别分类
研究方向:Materials Science
Web of Science 类别:Materials Science, Multidisciplinary