First-principles prediction of ductility in β-type Ti-Mo binary alloys

被引：3

作者：

Lai M.-J. ^{[1
]}

Xue X.-Y. ^{[1
]}

Zhou Z.-B. ^{[1
]}

Tang B. ^{[1
]}

Li J.-S. ^{[1
]}

Zhou L. ^{[1
]}

机构：

[1] State Key Laboratory of Solidification Processing, Northwestern Polytechnical University

来源：

Journal of Shanghai Jiaotong University (Science) | 2011年 / 16卷 / 2期

关键词：

charge density difference; ductility; first-principles; Ti-Mo alloys;

D O I：

10.1007/s12204-011-1127-2

中图分类号：

学科分类号：

摘要：

Recent studies suggest that the ratio of the shear modulus (G) to the bulk modulus (B) and the Poisson's ratio (ν) are good indicators of ductility. Using the method of supercell and the first-principles pseudopotential plane-wave method, the G/B and ν of the β-type Ti-Mo binary alloys with Mo molar fraction (x Mo) ranging from 6.25% to 37.5% are calculated. The results show that the ductility of β-type Ti-Mo binary alloys first increases with increasing x Mo and reaches the maximum when x Mo is about 25%, and then reduces with more increasing x Mo. The charge density difference calculations suggest that the x Mo dependence of the ductility can be ascribed to the change of bonding characteristics between Ti and Mo atoms in the [111] direction. © 2011 Shanghai Jiaotong University and Springer-Verlag Berlin Heidelberg.

引用

页码：227 / 230

页数：3

共 21 条

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