Heat treatment of hot-isostatic-pressed 60NiTi shape memory alloy:Microstructure,phase transformation and mechanical properties

作     者：Yinghao Zhou Xiyu Yao Wenfei Lu Dandan Liang Xiaodi Liu Ming Yan Jun Shen Yinghao Zhou;Xiyu Yao;Wenfei Lu;Dandan Liang;Xiaodi Liu;Ming Yan;Jun Shen

作者机构：College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Department of Materials Science and EngineeringShenzhen Key Laboratory for Additive Manufacturing of High-performance MaterialsSouthern University of Science and TechnologyShenzhen 518055China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第107卷第12期

页      面：124-135页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

主　　题：Ni-rich 60NiTi Hot isostatic pressing Heat treatment Phase transformation Mechanical properties 

摘      要：60NiTi alloy is considered to be a promising material for specialized bearing and gear applications due to its high hardness,strength,and low ***,fabricating 60NiTi through conventional processing methods is challenging due to the brittleness and poor *** this study,60NiTi with high relative density was successfully fabricated directly from pre-alloyed powder through hot isostatic *** effects of solution and aging treatments on microstructure and mechanical properties were systematically studied by advanced characterization *** hot-isostatic-pressed 60NiTi showed low average hardness and elastic strain due to the formation of a soft Ni_(3)Ti phase and B2 NiTi *** treatment above 1000℃dissolved the Ni_(3)Ti phase and promoted the formation of nanoscale Ni_(4)Ti_(3)precipitates,which significantly improved the hardness,strength,and elastic strain of *** formation of the Ni_(4)Ti_(3) phase can be mainly attributed to the driving forces induced by the chemical supersaturation and mechanical stress ***,the phase transformation mechanisms during heat treatment and compression test were discussed.