电磁场与TiB2纳米粒子对CuAlMn形状记忆合金凝固组织和性能的影响  

Effects of Electromagnetic Field and TiB Nanoparticles on Solidification Microstructure and Properties of CuAlMn Shape Memory Alloy

作　　者：金文中[1] 柳翊 田俊港 李廷举[2] 殷国茂[2] JIN Wenzhong;LIU Yi;TIAN Jungang;LI Tingju;YIN Guomao(Luoyang Key Laboratory of Advanced Materials Forming Technology,Luoyang Institute of Science and Technology,Luoyang 471023,China;School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]洛阳理工学院洛阳市先进材料成型技术重点实验室,河南洛阳471023 [2]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《热加工工艺》2020年第19期17-20,共4页Hot Working Technology

基　　金：国家自然科学基金项目(50474055);河南省高等学校重点科研项目(18A430019);洛阳理工学院预研项目(2017YZY08)。

摘　　要：使用扫描电子显微镜、光学显微镜和电子万能测试仪研究了电磁场与Ti B2纳米粒子对CuAlMn形状记忆合金组织和力学性能的影响。结果表明:电磁场能够有效抑制Ti B2纳米粒子的团聚,改善Ti B2纳米粒子的晶粒细化效果。当Ti B2纳米粒子的加入量为1%,电磁场电流为120A时,CuAlMn形状记忆合金锭的晶粒尺寸从1.62 mm细化至0.41 mm;合金的力学性能得到大幅提高,其中抗拉强度和伸长率分别提高到674MPa和18.2%。The effects of electromagnetic field and Ti B2 nanoparticles on solidification microstructure and mechanical properties of CuAlMn shape memory alloy were studied by SEM, OM and electronic universal tester. The results show that the electromagnetic field can effectively inhibit the agglomeration of Ti B2 nanoparticles, and improve the grain refinement effect of Ti B2 nanoparticles. The grain size of the CuAlMn shape memory alloy ingot decreases from 1.62 mm to 0.41 mm when the addition of Ti B2 nanoparticles is 1% and the current of electromagnetic field is 120 A;the mechanical properties of the alloy are greatly improved, the tensile strength and elongation increase to 674 MPa and 18.2%, respectively.

关 键 词：电磁场 TiB2纳米粒子 CuAlMn形状记忆合金 凝固组织 力学性能 

分 类 号：TG244.3[金属学及工艺—铸造] TG139.6[一般工业技术—材料科学与工程]