复合场与TiB2纳米粒子对CuAlMn形状记忆合金组织和性能的影响  

Effects of Compound Field and TiB2 Nanoparticles on Solidification Structure and Mechanical Properties of CuAlMn Shape Memory Alloy

作　　者：金文中[1] 曹永青 李林芳 Jin Wenzhong;Cao Yongqing;Li Linfang(Luoyang Key Laboratory of Advanced Materials Forming Technology,Luoyang Institute of Science and Technology)

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

出　　处：《特种铸造及有色合金》2020年第9期950-953,共4页Special Casting & Nonferrous Alloys

基　　金：河南省高等学校重点科研资助项目(18A430019);洛阳理工学院预研资助项目(2017YZY08)。

摘　　要：应用功率超声-电磁复合场与TiB2纳米粒子来改善CuAlMn形状记忆合金的组织和性能。使用扫描电镜和光学显微镜研究了复合场与TiB2纳米粒子对CuAlMn形状记忆合金组织和性能的影响。结果表明,功率超声-电磁复合场能够有效抑制TiB2纳米粒子的团聚,提高TiB2纳米粒子的晶粒细化效果。添加1%的TiB2纳米粒子的同时施加功率超声-电磁复合场,可以将CuAlMn形状记忆合金铸锭的晶粒尺寸从1.62mm细化至0.32mm。相应的,CuAlMn形状记忆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691MPa和19.7%。The solidification structure and mechanical properties of CuAlMn shape memory alloy were improved with the help of compound field(combination of power ultrasonic field and rotating electromagnetic field)and TiB2nanoparticles.The effects of compound field and TiB2nanoparticles on solidification structure and mechanical properties of CuAlMn shape memory alloy were investigated by SEM and optical microscope.The results show that compound field can effectively inhibit the agglomeration of TiB2nanoparticles,improving the grain refinement effect of TiB2nanoparticles.The grain size of the CuAlMn shape memory alloy ingot can be refined from 1.62mm to 0.32mm with adding 1%TiB2nanoparticles and applying compound field simultaneously.Accordingly,the tensile properties of the alloy are significantly improved,where tensile strength and elongation are increased to 691MPa and 19.7%,respectively.

关 键 词：复合场 TiB2纳米粒子 CuAlMn形状记忆合金 晶粒细化 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG146.11[金属学及工艺—合金]