Elastic and plastic characteristics of a model Cu-Zr amorphous alloy

被引：4

作者：

Nakamura, Akiho ^{[1
]}

Kamimura, Yasushi ^{[1
]}

Edagawa, Keiichi ^{[1
]}

Takeuchi, Shin ^{[2
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan

[2] Tokyo Univ Sci, Sinjuku Ku, Tokyo 1628601, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 614卷

关键词：

Amorphous alloy; Metallic glass; Elasticity; Plastic deformation; Computer simulation; METALLIC GLASSES; DEFORMATION; SHEAR; DYNAMICS; REARRANGEMENTS; LOCALIZATION;

D O I：

10.1016/j.msea.2014.07.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Athermal quasistatic simulation of shear deformation has been conducted for a realistic model Cu-Zr amorphous alloy to investigate characteristic features of elasticity and plasticity of the material. Significant reduction of the shear modulus by nonaffine atomic displacements and appreciable nonlinearity of elasticity have been observed. The fourth-order elastic constant in shear deformation and the ideal shear strength have been evaluated. Plastic deformation has been observed to start with isolated local shear transformations (LSTs) followed by collective LSTs leading to the formation of a shear band. Participation-ratio analysis (PRA) has demonstrated how the nonaffine displacement field converges as the system approaches the critical point of losing structural stability. PRA has also evaluated quantitatively the numbers of atoms participating in LSTs - the average number is about 30. Spatially anisotropic development of nascent shear band on a plane has been shown, attributable to anisotropic internal stress field induced by an LST. The evaluated stresses for the shear-band nucleation and for its propagation have indicated that the yielding in real materials is controlled by the shear-band propagation, as previously pointed out. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：16 / 26

页数：11

共 50 条

[1] CRYSTALLIZATION OF AN AMORPHOUS CU-ZR ALLOY
VITEK, JM
VANDERSANDE, JB
GRANT, NJ
[J]. ACTA METALLURGICA, 1975, 23 (02): : 165 - 176
[2] ELECTRICAL PROPERTIES OF AMORPHOUS CU-ZR ALLOY
MURATA, T
TOMIZAWA, S
FUKASE, T
MASUMOTO, T
[J]. SCRIPTA METALLURGICA, 1976, 10 (02): : 181 - 184
[3] INDUCED CRYSTALLIZATION OF AN AMORPHOUS CU-ZR ALLOY
STERGIOUDIS, GA
GASTALDI, J
JOURDAN, C
[J]. MATERIALS RESEARCH BULLETIN, 1985, 20 (03) : 275 - 280
[4] MECHANICAL-PROPERTIES OF AMORPHOUS CU-ZR ALLOY
TOMIZAWA, S
MASUMOTO, T
[J]. SCIENCE REPORTS OF THE RESEARCH INSTITUTES TOHOKU UNIVERSITY SERIES A-PHYSICS CHEMISTRY AND METALLURGY, 1977, 26 (4-5): : 263 - 269
[5] MECHANICAL-PROPERTIES OF AN AMORPHOUS CU-ZR ALLOY
VITEK, JM
GRANT, NJ
[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1975, 6 (07): : 1472 - 1473
[6] Formation of amorphous phase in the binary Cu-Zr alloy system
Kwon, O. J.
Kim, Y. C.
Kim, K. B.
Lee, Y. K.
Fleury, E.
[J]. METALS AND MATERIALS INTERNATIONAL, 2006, 12 (03) : 207 - 212
[7] Discrepancies in the Microstructures of Annealed Cu-Zr Bulk Alloy and Cu-Zr Alloy Films
Sun, Haoliang
Huang, Xiaoxue
Lian, Xinxin
Wang, Guangxin
[J]. MATERIALS, 2019, 12 (15)
[8] Plastic deformation characteristics of Cu/X (X=Cu-Zr, Zr) nanolayered materials
Zhang, J. Y.
Wang, Y. Q.
Liu, G.
Sun, J.
[J]. APPLIED SURFACE SCIENCE, 2014, 321 : 19 - 23
[9] Elastic and transport properties of nanolayered crystalline Cu/amorphous Cu-Zr multilayers
He, C.
Wu, X. L.
Liu, G.
Zhang, W. X.
[J]. MATERIALS & DESIGN, 2016, 106 : 133 - 138
[10] ACTIVATION OF AMORPHOUS CU-ZR ALLOYS
SHIBATA, M
KAWATA, N
MASUMOTO, T
KIMURA, HM
[J]. JOURNAL OF CATALYSIS, 1987, 108 (01) : 263 - 267

← 1 2 3 4 5 →