Stress induced atomic-scale damage and relaxation in bulk metallic glasses

被引：7
作者：
Liu, Zhiyuan [1 ,2 ]
Yang, Yong [2 ]
Lu, Jian [2 ]
Wang, Gongyao [3 ]
Liaw, Peter K. [3 ]
Liu, Chain-Tsuan [2 ]
机构：
[1] Shenzhen Univ, Dept Mech & Elect Engn, Shenzhen Key Lab Adv Mfg Technol Mold & Die, Shenzhen, Peoples R China
[2] City Univ Hong Kong, Coll CSE, Dept Mech & Biomed Engn, Ctr Adv Struct Mat, Kowloon, Hong Kong, Peoples R China
[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 652卷
关键词：
Bulk metallic glasses; Atomic-scale damage; Relaxation; Electric resistivity; STRUCTURAL RELAXATION; ELECTRICAL-RESISTIVITY; FATIGUE BEHAVIOR; HIGH-RESOLUTION; DEFORMATION; TEMPERATURE;
D O I：
10.1016/j.jallcom.2015.08.176
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The nanoscale Electric Contact Resistance (nanoECR) system with a high resolution is used to study the possible structural change in bulk metallic glasses (BMGs) after stimulation of cyclic stress. It is found that the electrical current traveling through the fatigue-tested Zr50Cu40Al10 BMG specimen is much lower than that of as-cast one at the same electric voltage. Excluding the effect of sample geometry, it is revealed that the increase in the electric resistivity of the fatigue-tested BMG is due to a more disordered structure. Furthermore, our results show pronounced atomic-scale damage and relaxation in the fatigue-tested BMG, shedding quantitative insights into the process of structural evolution in BMGs under cyclic loadings. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：185 / 190
页数：6
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