摘要
为了探索简单高效且能制备出具有复杂形状、优异性能的Fe-Mn-Si基形状记忆合金的新工艺,采用激光同轴送粉沉积工艺制备Fe-Mn-Si基形状记忆合金,并研究其组织结构、机械性能和形状记忆性能。研究结果表明:沉积态Fe-Mn-Si基形状记忆合金由γ−奥氏体和ε−马氏体组成,且母相奥氏体基体内有大量层错存在。沉积态Fe-Mn-Si基形状记忆合金室温下的名义屈服强度为508 MPa,拉伸强度为1030 MPa,伸长率达31%,最大可回复变形量为3.6%,其形状记忆性能优于传统固溶态变形加工Fe-Mn-Si基形状记忆合金的形状记忆性能。因此,采用激光增材制造技术制备Fe-Mn-Si基形状记忆合金具有广阔的前景。
In order to explore new simple and efficient process for preparing Fe-Mn-Si based shape memory alloy with complex shape and excellent performance,Fe-Mn-Si base shape memory alloy was prepared by laser melting deposition and its microstructure,mechanical and shape memory property were studied.The results show that the as-deposited sample is composed ofγ−austenite andε−martensite,and the matrix contains a large number of stacking faults.The nominal yield strength,tensile strength,elongation of as-deposited alloy at room temperature are 508 MPa,1030 MPa and 31%,respectively.Consequently,the maximum recoverable strain of printed Fe-Mn-Si based shape memory alloy is 3.6%,which is higher than that of traditionally deformation processed alloy.Therefore,additively manufactured Fe-Mn-Si based shape memory alloy possesses broad prospect.
作者
姚聪
李瑞迪
袁铁锤
牛朋达
YAO Cong;LI Ruidi;YUAN Tiechui;NIU Pengda(State key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第11期3081-3087,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51871249)
湖南省自然科学基金资助项目(2020JJ2046)。
