First-principles Calculations of the Elastic Poperties of the Teta-Ti-Nb-Zr Ternary Alloys
In this paper, the elastic moduli of the beta-Ti-NbZr ternary alloys with the nominal composition of Ti24Nb, Ti20Nbl2Zr, Til7Nb21Zr, Ti1 1Nb38Zr,Ti6Nb53Zr and Ti70Zr were investigated by using firstprinciples calculation and the experimental measurement The results show that, with decreasing Nb content, the calculated Youngs modulus decreases, however the experimental Youngs modulus first decreases and then increases. This difference may be explained by considering the stability of the beta phase; with C＞0,the beta phase is elastically stable and both the calculated and experimental Youngs moduli follow the same decreasing trends with Nb content; with C＜0,the beta phase become elastically unstable such that a second phase may precipitate and hardens the alloy. In this case, the calculated Youngs modulus is not comparable with the experimental Youngs modulus. Therefore the minimum experimental Youngs modulus is expected to occur at C≈l.5 GPa.
First-principles elastic constants Youngs modulus titanium(Ti) alloys
You Li Song Xiping Zhang Yong Lin Junpin Chen Guoliang
State key laboratory for advanced metals and material,University of science and technology Beijing,Beijing 100083,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
2160-2163
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）