Twinning and detwinning mechanisms in a BCC Ti Mo-Fe multilayered alloy

被引：2

作者：

Gutierrez-Urrutia, I. ^{[1
]}

Li, C-L ^{[1
]}

Emura, S. ^{[1
]}

Tsuchiya, K. ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Sengen 1-2-1, Tsukuba, Ibaraki, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Ibaraki, Japan

来源：

38TH RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE | 2017年 / 219卷

关键词：

PLASTIC-DEFORMATION; GROWTH TWINS; METALS; INSTABILITY; BOUNDARIES; BEHAVIOR;

D O I：

10.1088/1757-899X/219/1/012042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated {332}<113> twinning and detwinning mechanisms in a multilayered Ti-10Mo-xFe (x = 1-3) alloy fabricated by multi-pass hot rolling. A strong influence of the Fe-graded structure on both phenomena is observed. The propagation of twins that are nucleated in Fe-lean regions (similar to 1 wt.% Fe) is interrupted in the grain interiors at about 2 wt% Fe. We ascribe this effect to the role of the Fe content on the stress for twin propagation. The unusual twin structure determines the subsequent detwinning process upon thermal annealing. This process consists of two independent detwinning events that occur at two different microstructural regions, namely at twin tips located at grain interiors and at grain boundaries. Both detwinning modes can be explained from a thermodynamic standpoint whereby the boundary dissociation processes minimize the boundary free energy.

引用

页数：7

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