Near-Iinear elastic deformation behavior of a novel Zr-Ti-Nb-Sn alloy with multi-phase microstructures ofβ,α"andα'phases  

作　　者：Wen Ma Hao Huang Wang Ding Shun Guo Hai-Xia Liu Xiao-Nong Cheng 

机构地区：[1]School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,China [2]China Grinm Group Co.,Ltd.,Bejing,100088,China

出　　处：《Rare Metals》2023年第5期1670-1677,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52175410);the Six Talent Peaks Project in Jiangsu Province(No.2019-XCL-113);Zhenjiang Science&Technology Program(No.GY2020001);the Project of Faculty of Agricultural Equipment of Jiangsu University(No.NZXB20200101)。

摘　　要：In this work,a multi-phase Zr-30Ti-7Nb-4Sn alloy with large near-linear elastic deformability was prepared by the solution treatment plus pre-straining(S TP)treatment,and the underlying mechanism accountable for the near-linear elastic deformation was systematically clarified.It was found that the Zr-30Ti-7Nb-4Sn alloy was composed ofβ,α″andα′phases,and numerous dislocations were formed in the alloy specimen after STP treatment.With the retarding effect of high-density dislocations,the stress-induced martensitic(SIM)transformation fromβtoα″phases took place homogeneously and continuously during loading,in conjunction with the occurrence of elastic deformation ofβ,α″andα′phases.Under the entire tensile procedure,no observable phase transformation occurred betweenα′martensite andβphase.Consequently,the near-linear elastic deformation capability in STP Zr-30Ti-7Nb-4Sn alloy is mainly ascribed to the coupling actions of consecutiveβ→α″SIM transformation and intrinsic elastic deformation ofβ,α″andα′phases.These experimental results provide a basis for designing and developing novel multi-phase Zr-based alloys that possess large near-linear deformability.

关 键 词：Zr-based alloy MULTI-PHASE Near-linear deformation behavior Martensitic transformation 

分 类 号：TG146.414[一般工业技术—材料科学与工程]