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α→β Transformation characteristics revealed by pulsed laser-induced non-equilibrium microstructures in duplex-phase Zr alloy

查看全文 作　　者：CHAI [1]LinJiang;WANG Shu [1]Yan;WU [1]Hao;GUO [2]Ning;PAN [3]HuCheng;CHEN Liang [4]Yu;MURTY [5]K.L.;SONG [2]Bo 高影响力作者 机构地区：[1]College of Materials Science and Engineering,Chongqing University of Technology;[2]Faculty of Materials and Energy,Southwest University;[3]Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University;[4]School of Mathematics and Science,Jiangsu University of Science and Technology;[5]Department of Nuclear Engineering,North Carolina State University高影响力机构 出　　处：《Science China(Technological Sciences)》索引2017年第60卷第8期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Grant No.51401040);China Postdoctoral Science Foundation(Grant No.2015M572446);Postdoctoral Science Foundation of Chongqing(Grant No.Xm2015003);Scientific and Technological ResearchProgram of Chongqing Municipal Education Commission(Grant No.KJ1500901) 摘　　要：Microstructures of a duplex-phase Zr-2.5Nb alloy treated by pulsed laser were characterized by electron backscatter diffraction(EBSD) and electron channeling contrast(ECC) imaging techniques.Major attention has been paid to non-equilibrium hybrid microstructure consisting of both prior a and β phases,and a plates transformed from new β phases to probe α→β transformation characteristics in the alloy.The origin of the hybrid microstructure is attributed to the specific thermodynamic conditions induced by the pulsed laser treatment.ECC observation shows that newly formed β phases during laser heating prefer to nucleate and grow at the expense of edges of prior a grains rather than their interiors.EBSD analyses further reveal that orientations of the new βphases are not determined by the prior a grains according to the Burgers relationship but maintain those of the prior β phases in an epitaxial growth way. 关 键 词：非平衡组织 双相合金 转化特征 激光诱导 脉冲 电子背散射衍射 显示 EBSD
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