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

被引：0

作者：

CHAI LinJiang ^{[1
]}

WANG Shu Yan ^{[1
]}

WU Hao ^{[1
]}

GUO Ning ^{[2
]}

PAN HuCheng ^{[3
]}

CHEN Liang Yu ^{[4
]}

MURTY K.L. ^{[5
]}

SONG Bo ^{[2
]}

机构：

[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

来源：

Science China(Technological Sciences) | 2017年 / 60卷 / 08期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Zr alloy; microstructure; phase transformation; laser treatment; electron backscatter diffraction;

D O I：

暂无

中图分类号：

TG146.414 [];

学科分类号：

080502 ;

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.

引用

页码：1255 / 1262

页数：8

共 29 条

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