Super-elastic titanium alloy with unstable plastic deformation

被引：249

作者：

Hao, YL ^{[1
]}

Li, SJ ^{[1
]}

Sun, SY ^{[1
]}

Zheng, CY ^{[1
]}

Hu, QM ^{[1
]}

Yang, R ^{[1
]}

机构：

[1] Chinese Acad Sci, Met Res Inst, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 09期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2037192

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Here we report a non-toxic beta-type titanium alloy exhibiting unstable elastic and plastic deformation behavior. Elastic instability leads to remarkable elastic softening, i.e., the decrease of incipient Young's modulus with slight pre-straining. In spite of partial recovery during room-temperature aging, a stable modulus of 33 GPa matching that of human bone can be maintained. Plastic instability causes highly-localized deformation which is very effective in grain refinement but contributes little to strength. We thus obtain soft nanostructured metallic materials (NMMs): The flow stress increases by only similar to 5.5% as coarse grains are reduced to below 50 nm, in contrast with several times increase for previously-reported NMMs.

引用

页数：3

共 15 条

[1]

New δ (distorted-bcc) titanium to 220 GPa -: art. no. 275503 [J].