Thermo-mechanical processing and the shape memory effect in an Fe-Mn-Si-based shape memory alloy

被引：77

作者：

Stanford, N ^{[1
]}

Dunne, DP ^{[1
]}

机构：

[1] Univ Wollongong, Fac Engn, Wollongong, NSW 2522, Australia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 422卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

shape memory; training; ferrous alloys; cold rolling; annealing;

D O I：

10.1016/j.msea.2006.02.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of cold rolling and annealing on the shape memory effect (SME) in an Fe-Mn-Si-based alloy has been studied. It has been found that the SME in these alloys can be significantly increased by the appropriate thermo-mechanical processing (TMP). The optimum conditions were found to be 15% cold rolling followed by annealing at 800 degrees C for 15 min. This produced a total strain recovery of 4.5%. TEM showed that this processing schedule produces a microstructure of evenly spaced, and well defined stacking faults throughout the parent phase. It is shown for the first time that samples processed in this way produce a larger fraction of martensite compared to samples in the as-austenitized condition. It is concluded that the stacking faults induced by TMP act as nucleation sites for martensite formation during deformation. The SME is improved primarily as a result of the increased amount of martensite that is formed in this condition. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：352 / 359

页数：8

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