Fracture and strength of a TiZr-based metallic glass at low temperatures

被引：4
|
作者：
Wu, S. J. [1 ,2 ]
Qu, R. T. [1 ,2 ]
Wang, X. D. [1 ]
Zhu, Z. W. [3 ]
Zhang, H. F. [3 ]
Zhang, Z. F. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 768卷
基金：
中国国家自然科学基金;
关键词：
Metallic glass; Low temperature; Strength; Failure criterion; Shear fracture; MECHANICAL-BEHAVIOR; SHEAR; DEFORMATION; PLASTICITY; TRANSITION; FAILURE; FLOW;
D O I：
10.1016/j.msea.2019.138453
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
With decreasing the testing temperature, a TiZr-based metallic glass (MG) shows obvious increments in yield strengths, tension-compression strength asymmetry, and deviations of shear-fracture-angle, implying that the MG displays increased resistance to plastic shearing but decreased critical stress for brittle normal fracture. These results well explain the ductile-to-brittle transition of MGs caused by low temperature. Besides, the low-temperature failure criterion was established and applied to various other MGs. It is demonstrated that the MGs with lower Poisson's ratio may be more sensitive to suffer low-temperature induced brittle fracture.
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页数：7
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