宋帆,张成燕,王珊玲,彭华备,文玉华

• 1:四川大学制造科学与工程学院
• 2:四川大学分析测试中心

摘要(Abstract)：

采用OM、XRD和SQUID研究了在77~293 K变形时固溶态Fe-17Mn-5.5Si-9Cr-5.5Ni-0.12C合金的形状记忆效应和微观组织随变形温度的演化规律。结果表明:当变形温度在223~293 K之间时,固溶态Fe-17Mn-5.5Si-9Cr-5.5Ni-0.12C合金的奥氏体屈服强度与应力诱发ε马氏体临界应力的差值△σ0.2从293 K的26 MPa迅速增加至223 K的105 MPa,即奥氏体抵抗塑性变形的能力随变形温度的降低而显著提高,所以其形状回复率从293 K的42%显著提高至223 K的72%;当进一步降低变形温度至77 K时,△σ0.2仅缓慢增加至125 MPa,即奥氏体抵抗塑性变形的能力缓慢提高,所以其形状回复率仅小幅提高至81%。

关键词(KeyWords)： 形状记忆合金;变形温度;马氏体相变;塑性滑移

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171123,51401136)

作者(Author): 宋帆,张成燕,王珊玲,彭华备,文玉华

DOI: 10.13289/j.issn.1009-6264.2015.09.001

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