Deformability and nanostructuring of TiNi shape-memory alloys during electroplastic rolling

被引：54

作者：

Stolyarov, V. V. ^{[1
]}

机构：

[1] RAS, Mech Engn Res Inst, Moscow 101990, Russia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 503卷 / 1-2期

关键词：

Nitinol; Nanostructure; Electroplastic rolling; Deformability;

D O I：

10.1016/j.msea.2008.01.094

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Electropulse current effects during cold rolling on deformability, nanostructure formation and mechanical behavior in coarse-grained (CG) and ultrafine-grained (UFG) TiNi alloys enriched by nickel are investigated. An ultrafine-grained sample processed by cold rolling with current has a fracture strain (e = 1.91) which is higher than that without a current (e = 0.59). As a result of cold rolling with a current and a subsequent annealing at 400-450 degrees C, nanostructure is formed in both alloys, which leads to a significant enhancement of yield and ultimate stresses. It is shown that the efficiency of electroplastic rolling depends on the purity of the alloys. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：18 / 20

页数：3

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