Effect of Carbon Addition on Recovery Behavior of Trained Fe-Mn-Si Based Shape Memory Alloys

被引：12
|
作者：
Peng, Huabei [1 ]
Chen, Jie [1 ]
Wang, Shanling [2 ]
Wen, Yuhua [1 ]
机构：
[1] Sichuan Univ, Coll Mfg Sci & Engn, Chengdu 610065, Peoples R China
[2] Sichuan Univ, Analyt & Testing Ctr, Chengdu 610065, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2015年 / 17卷 / 02期
基金：
中国国家自然科学基金;
关键词：
CR-NI ALLOY; THERMOMECHANICAL TREATMENT; MARTENSITIC-TRANSFORMATION; FE-14MN-5SI-9CR-5NI ALLOY; EPSILON TRANSFORMATION; ALPHA-MARTENSITE; IMPROVEMENT; MECHANISM; MICROSTRUCTURES; POLYCRYSTALS;
D O I：
10.1002/adem.201400193
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate microstructures and recovery behavior of trained Fe-14Mn-5Si-8Cr-4Ni and Fe-14Mn-5Si-8Cr-4Ni-0.12C alloys under different deformation strains by color optical micrographs, XRD, and SQUID. The training results in the formation of alpha' martensite in Fe-14Mn-5Si-8Cr-4Ni alloy, while introduces Cr23C6 particles besides the alpha' martensite in Fe-14Mn-5Si-8Cr-4Ni-0.12C alloy. The stress-induced emartensite bands are thinner in trained Fe-14Mn-5Si-8Cr-4Ni-0.12C alloy than in trained Fe-14Mn-5Si-8Cr-4Ni alloy. When the deformation strain is below 8%, the recovery strain of trained Fe-14Mn-5Si-8Cr-4Ni-0.12C alloy is slightly lower than that of trained Fe-14Mn-5Si-8Cr-4Ni alloy. This result is attributed to the fact that the M-s temperature of Fe-14Mn-5Si-8Cr-4Ni-0.12C alloy is much below the deformation temperature than that of Fe-14Mn-5Si-8Cr-4Ni alloy. When the deformation strain is above 8%, the recovery strain of trained Fe-14Mn-5Si-8Cr-4Ni-0.12C alloy is higher than that of trained Fe-14Mn-5Si-8Cr-4Ni alloy. The reason for this result is that in trained Fe-14Mn-5Si-8Cr-4Ni-0.12C alloy, both alpha' martensite and Cr23C6 particles prevent stress-induced epsilon martensite bands from colliding each other at large deformation strain, and the width of stress-induced epsilon martensite bands is smaller as compared with trained Fe-14Mn-5Si-8Cr-4Ni alloy. It is concluded that carbon addition can improve the recovery strain of trained Fe-Mn-Si based shape memory alloys at large deformation strain.
引用
收藏
页码：205 / 210
页数：6
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