Martensitic stabilization and defects induced by deformation in TiNi shape memory alloys

被引：15

作者：

Wang, Shuai ^{[1
]}

Tsuchiya, Koichi ^{[2
]}

Wang, Lei ^{[1
]}

Umemoto, Minoru ^{[3
]}

机构：

[1] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China

[2] Natl Inst Mat Sci, Innovat Mat Engn Lab, Struct Funct Res Grp, Tsukuba, Ibaraki 3050047, Japan

[3] Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2011年 / 18卷 / 01期

关键词：

shape memory alloys; transmission electron microscopy; martensitic transformations; stabilization; defects; AL-NI ALLOY; ELECTRON-MICROSCOPY; TRANSFORMATION; REORIENTATION; MICROSTRUCTURE; MECHANISM; PHASE; TWINS;

D O I：

10.1007/s12613-011-0401-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Martensitic stabilization caused by deformation in a TiNi shape memory alloy was studied. Special attention was paid to the deformed microstructures to identify the cause of martensitic stabilization. Martensitic stabilization was demonstrated by differential scanning calorimetry for the tensioned TiNi shape memory alloy. Transmission electron microscopy revealed that antiphase boundaries were formed because of the fourfold dissociation of [110](B19), super lattice dislocations and were preserved after reverse transformation due to the lattice correspondence. Martensitic stabilization was attributed to dislocations induced by deformation, which reduced the ordering degree of the microstructure, spoiled the reverse path from martensite to parent phase compared with thermoelastic transformation, and imposed resistance on phase transformation through the stress field.

引用

页码：66 / 69

页数：4

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