Micromechanisms of plastic deformation of a dendrite/Zr-based bulk-metallic-glass composite

被引：75
作者：
Qiao, J. W. [1 ]
Zhang, Y. [1 ]
Liaw, P. K. [2 ]
Chen, G. L. [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
来源：
SCRIPTA MATERIALIA | 2009年 / 61卷 / 11期
关键词：
Bulk metallic glass (BMG); Composites; Shear band; Deformation structure; TENSILE DUCTILITY; MATRIX COMPOSITES; MECHANICAL-PROPERTIES; MICROSTRUCTURE;
D O I：
10.1016/j.scriptamat.2009.08.044
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A dendrite/bulk-metallic-glass composite with a composition of Zr58.5Ti14.3Nb5.2Cu6.1Ni4.9Be11.0 exhibits room-temperature plasticity and a work-hardening capacity upon compressive loading. The improved plastic deformation is mainly characterized by the multiplication of shear bands. Severe lattice distortion and local amorphization in the dendrites, as well as pile-ups of dislocations close to the interface between the dendrites and the glass matrix upon straining, are jointly responsible for the accommodation of plastic strains and work hardening, which constitute the micromechanisms of the plastic deformation. Crown Copyright (C) 2009 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.
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收藏
页码：1087 / 1090
页数：4
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