Deformation-induced ambient temperature α-to-β phase transition and nanocrystallization in (α plus β) titanium alloy

被引：14

作者：

Han, Yong ^{[1
]}

Zhuang, Huaye ^{[1
]}

Lu, Jian ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2009年 / 24卷 / 11期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

HIGH-PRESSURE TORSION; TRANSFORMATION; ZIRCONIUM; STABILITY; MECHANISM; BEHAVIOR; STRESS; CREEP; METAL;

D O I：

10.1557/JMR.2009.0420

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ambient temperature alpha-to-beta phase transition and nanocrystallization in the aged Ti-25Nb-3Mo-3Zr-2Sn titanium alloy was achieved by surface mechanical attrition treatment (SMAT). The phase transition occurs at alpha/beta interfaces and extends to alpha phase interiors with increasing strain. It is irreversible and diffusion controlled. The stress-induced increase of Gibbs energy and enrichment of Nb may cause a high order of lattice instability of the alpha phase adjacent to the alpha/beta interfaces and compel the alpha phase to beta phase. The presence of fine alpha needles in the aged alloy and the phase transition from alpha to beta with increasing strain are viewed to play a crucial role in the subsequent nanostructuring.

引用

页码：3439 / 3445

页数：7

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