First-principles Calculations of the Elastic Poperties of the Teta-Ti-Nb-Zr Ternary Alloys

被引：0

作者：

You Li ^{[1
]}

Song Xiping ^{[1
]}

Zhang Yong ^{[1
]}

Lin Junpin ^{[1
]}

Chen Guoliang ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

TI-2011: PROCEEDINGS OF THE 12TH WORLD CONFERENCE ON TITANIUM, VOL III | 2012年

关键词：

First-principles; elastic constants; Young ' s modulus; titanium(Ti) alloys; MODULUS;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In this paper, the elastic moduli of the beta-Ti-Nb-Zr ternary alloys with the nominal composition of Ti24Nb, Ti2ONbl2Zr, Til7Nb21Zr, TillNb38Zr, Ti6Nb53Zr and Ti70Zr were investigated by using first -principles calculation and the experimental measurement. The results show that, with decreasing Nb content, the calculated Young's modulus decreases, however the experimental Young's 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 Young's 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 Young's modulus is not comparable with the experimental Young's modulus. Therefore the minimum experimental Young's modulus is expected to occur atc'approximate to 1.5 GPa

引用

页码：2160 / 2163

页数：4

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