Mn元素对Cu-Al-Ni记忆合金组织和性能的影响  

The effect of Mn element on the microstructure and properties of Cu-Al-Ni shape memory alloy

作　　者：任建辉 刘琪琪 李杰[1] 张欣[1] REN Jianhui;LIU Qiqi;LI Jie;ZHANG Xin(School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学材料科学与工程学院,天津300384

出　　处：《天津理工大学学报》2022年第3期51-54,共4页Journal of Tianjin University of Technology

基　　金：大学生创新创业项目(201910060029)。

摘　　要：通过光学显微镜、扫描电子显微镜、X射线衍射和电子万能力学试验机等研究了Mn元素对Cu-13.0Al-4.0Ni高温形状记忆合金室温组织与性能的影响。结果表明:Cu-13.0Al-4.0Ni-1.0Mn合金的室温组织与未掺杂合金类似,仍由18R与2H 2种马氏体组成,但其力学性能相比于未掺杂合金有较大的提升,压缩断裂强度从580MPa提升至756 MPa,压缩断裂应变从10.5%提升至23.3%。此外,当给予Cu-13.0Al-4.0Ni-1.0Mn合金10%的预压缩并加热后,可得到6%的形状记忆效应。The effect of Mn on the microstructure and properties of Cu-13.0Al-4.0Ni high temperature shape memory alloy at room temperature was studied by metallography,scanning,X-ray diffraction and electronic universal testing machine.The results show that the room temperature microstructure of Cu-13.0Al-4.0Ni-1.0Mn alloy is similar to that of original alloy,which is still composed of 18R and 2H martensite. Besides,its mechanical properties are greater than that of undoped alloy. The compressive fracture strength is increased from 580 MPa to 756 MPa,and the compressive fracture strain is increased from 10.5% to 23.3%. In addition,when the Cu-13.0Al-4.0Ni-1.0Mn alloy is given a 10% precompression and heated,a 6% shape memory effect can be obtained.

关 键 词：形状记忆合金 CU-AL-NI 微观组织 力学性能 

分 类 号：TV139.2[水利工程—水力学及河流动力学]