Improving plasticity of the Zr46Cu46Al8 bulk metallic glass via thermal rejuvenation

被引：81
|
作者：
Song, Wenli [1 ]
Meng, Xiaohe [1 ]
Wu, Yuan [1 ]
Cao, Di [1 ]
Wang, Hui [1 ]
Liu, Xiongjun [1 ]
Wang, Xianzhen [2 ]
Lu, Zhaoping [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
SCIENCE BULLETIN | 2018年 / 63卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Bulk metallic glasses; Cryogenic thermal cycling; Defect density; Plasticity; MECHANICAL-PROPERTIES; COMPOSITES; DUCTILITY; STRENGTH; PERCOLATION; RELAXATION; BEHAVIOR; STRESS; STRAIN; ALLOY;
D O I：
10.1016/j.scib.2018.04.021
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In this paper, effects of cryogenic thermal cycling on deformation behavior and thermal stability of the Zr46Cu46Al8 bulk metallic glass (BMG) were studied. The results show that with the increase of the number of cryogenic thermal cycles (CTC), thermal stability remains almost unchanged, while the plasticity is increased, indicating that the cryogenic thermal cyclic treatment is an effective way to improve plasticity of metallic glasses without distinctly deteriorating thermal stability. Our analysis suggests that the increase in the defect density resulted from the cryogenic thermal treatments are responsible for the plasticity increment. Variation of yield strength can be well interpreted from microstructural percolation which affected by both density and characteristic volume of the defect sites. (C) 2018 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
引用
收藏
页码：840 / 844
页数：5
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