标题
作者
作者:Yuan, B (Yuan, B.)[1,2 ]; Yang, B (Yang, B.)[1 ]; Gao, Y (Gao, Y.)[1,2 ]; Lai, M (Lai, M.)[1 ]; Chen, XH (Chen, X. H.)[1 ]; Zhu, M (Zhu, M.)[1,2 ]
期刊信息
摘要
Dense and porous nickel-free Ti-11Nb-4O (at.%) alloys with & temperature closed to body temperature were fabricated by conventional powder metallurgy (sintering) method from elemental Ti and Nb powders. Their microstructure, phase transformation temperature, superelasticity and mechanical properties at room temperature were investigated by optical microscopy, X-ray diffraction, differential scanning calorimetry and compression testing. It has been found that the phase temperature of Ti-11Nb-40 alloy by sintering is different from that by smelting and cold-rolling method due to the introduction of oxygen during powder mixing and sintering, and the & temperature can reach up about 40 degrees C by reducing Nb content and controlling oxygen. Near dense Ti-11Nb-40 alloys can exhibit more than 5.4% superelasticity, high cyclic stability up to 100 cycles, high yield strength of 1.48 GPa and small strain hysteresis of 0.14% at room temperature. Moreover, porous Ti-11Nb-40 alloys with 29.4% porosity also can show complete superelasticity of near 3%, yield strength of 800 MPa and elastic modulus of 24.5 GPa at room temperature, which can be considered as one of perfect bone replacement materials in conjunction with their excellent biocompatibility. (C) 2015 Elsevier Ltd. All rights reserved.
关键词
作者关键词:Ni-free shape memory alloys; Superelasticity; Porous alloys
作者信息
通讯作者地址:Zhu, M (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China. |
地址:
| [ 1 ] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China |
| [ 2 ] Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou, Guangdong, Peoples R China |
电子邮件地址:memzhu@scut.edu.cn
出版商
类别分类
研究方向:Materials Science
Web of Science 类别:Materials Science, Multidisciplinary