School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
J Mech Behav Biomed Mater. 2017 Nov;75:574-580. doi: 10.1016/j.jmbbm.2017.05.025. Epub 2017 May 19.
Ti-13Nb-(0-6)Zr alloys were fabricated by conventional powder metallurgy sintering method. Their microstructure, phase transformation temperature and mechanical properties were investigated by optical microscopy, scanning electron microscope, X-ray diffraction, differential scanning calorimetry and compression test. It was found that with more Zr addition, the content of β phase increased while the content of precipitated α phase reduced. With 1 at% Zr increase, the Ms of Ti-13Nb-(0~6)Zr alloys decreased linearly by around 10°C. The compression test results revealed that sintered Ti-13Nb-2Zr owned a recoverable strain as high as 3.7% at room temperature, and Ti-13Nb-4Zr and Ti-13Nb-6Zr exhibited a remarkable recoverable strain of 4.4% at their Ms temperature which was lower than room temperature, indicating that these two alloys have a higher intrinsic recoverable strain and may be further optimized.
采用传统粉末冶金烧结法制备了 Ti-13Nb-(0-6)Zr 合金。通过光学显微镜、扫描电子显微镜、X 射线衍射、差示扫描量热法和压缩试验研究了它们的微观结构、相变温度和力学性能。结果表明，随着 Zr 含量的增加，β 相的含量增加，而析出的α 相的含量减少。随着 Zr 含量增加 1at%，Ti-13Nb-(0~6)Zr 合金的 Ms 温度线性下降约 10°C。压缩试验结果表明，在室温下，烧结态 Ti-13Nb-2Zr 具有高达 3.7%的可恢复应变，而 Ti-13Nb-4Zr 和 Ti-13Nb-6Zr 在低于室温的 Ms 温度下表现出显著的 4.4%的可恢复应变，表明这两种合金具有更高的固有可恢复应变，可能需要进一步优化。
