不同预应变量Fe-30Mn-6Si-5Cr形状记忆合金热机械训练效果研究  

The Effect Study of Thermal Train on Various Prestrained Fe30Mn6Si5Cr Shape Memory Alloy

作　　者：夏瑞东[1,2] 刘冠威[1,2] 常悦 刘涛[1,2] 马如璋[1,2] 

机构地区：[1]北京科技大学材料物理系 [2]首都师范大学物理系

出　　处：《功能材料》1997年第6期576-579,共4页Journal of Functional Materials

基　　金：国家自然科学基金

摘　　要：研究了几种不同预应变量Ｆｅ３０Ｍｎ６Ｓｉ５Ｃｒ合金经室温预应变－４５０℃回火６次训练ＳＭＥ的变化；结果表明训练效果对预应变量有明显的依赖关系，预应变量εｐ为１％左右时６次训练恢复率没有明显变化，而εｐ为３％～４％时，恢复率显著提高，最大形变恢复率分别达９３％、７８％，εｐ大于５．５％后，第６次训练恢复率开始下降。并用金相及Ｘ射线衍射研究了εｐ分别为３％、５．５％的合金训练过程中微结构的变化。The effect of thermal train on recovery strain rate and transformation temperature of Fe30Mn6Si5Cr alloy with various prestrain has been studied. Results showed that the improvement of SME was related to the prestrain closely. The recovery strain rates ηr of samples with 3% and 4% prestrain have been increased remarkablely and maximum recovery strain rate could be reached at 93% and 78% respectively after sixth thermal cycle. The ηr of sample with 5.5% prestrain decreased after fifth train. The thermal train processes of samples with 3% and 5.5% were analysed by Xray diffraction and optical metallography.

关 键 词：热机械训练 应力诱发马氏体 形状记忆合金 

分 类 号：TG139.6[一般工业技术—材料科学与工程]