热机械训练过程中Fe-Mn-Si系形状记忆合金的组织演变

发布时间：2018-01-16 18:06

本文关键词：热机械训练过程中Fe-Mn-Si系形状记忆合金的组织演变　出处：《材料工程》2015年04期 　论文类型：期刊论文

【摘要】：采用金相、XRD、SEM和TEM等对Fe-Mn-Si系形状记忆合金在热机械训练过程中组织的演变进行研究。结果表明:热机械训练是应力诱发γ→ε马氏体相变及其逆相变过程的重复。训练前的组织中几乎不存在马氏体,训练后合金中应力诱发的ε马氏体分布比较均匀,相互平行,交叉现象较少。同时,晶体中的马氏体呈现ε马氏体区域择优取向,过多(5次以上)训练后,合金基体内部形成大量位错缠结。
[Abstract]:The microstructure evolution of shape memory alloy (SMA) of Fe-Mn-Si system during thermal mechanical training was studied by means of metallographic X-ray scanning electron microscopy (SEM) and TEM. The results show that thermal mechanical training is stress-induced 纬. 鈫扵he repeat of 蔚 martensite transformation and its inverse transformation process. There is almost no martensite in the microstructure before training, and the stress induced 蔚 martensite distribution in the alloy after training is relatively uniform, parallel to each other, and the cross phenomenon is less. The martensite in the crystal shows the preferred orientation of 蔚 martensite region, and after more than 5 times of training, a large number of dislocation entanglement are formed in the matrix of the alloy.
【作者单位】：同济大学材料科学与工程学院;西南交通大学牵引动力国家重点实验室;
【分类号】：TG139.6
【正文快照】： LU Qi 1,HE Guo-qiu1,CHEN Shu-juan1,SHE Meng1,LIU Yang1,YANG Yang1,ZHU Min-hao2(1College of Materials Science and Engineering,Tongji University,Shanghai 201804,China;2State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,Chin

【参考文献】