Relation between ideal and real strengths of metallic glasses

被引：6

作者：

Jiang, M. Q. ^{[1
]}

Jiang, F. ^{[2
]}

Keryvin, V. ^{[3
]}

Meng, J. X. ^{[3
]}

Sun, J. ^{[2
]}

Dai, L. H. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[3] Univ Bretagne S, Dept Mat Engn, LIMATB, Ctr Rech St Maude,EA4250, F-56321 Lorient, France

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2012年 / 358卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Metallic glasses; Ideal strength; Real strength; Potential energy landscape; Shear transformation zone; MEDIUM-RANGE ORDER; MECHANICAL-BEHAVIOR; SUPERCOOLED LIQUIDS; MATERIALS SCIENCE; ELASTIC LIMIT; DEFORMATION; TRANSITION; PACKING; FLOW;

D O I：

10.1016/j.jnoncrysol.2012.09.016

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Available experimental data of about 110 metallic glasses show that the ratios of room-temperature strengths to low-temperature ideal strengths have universal upper and lower bounds. The two bounds are rationalized by taking cooperative shearing of shear transformation zone (STZ) operations into consideration in the potential energy landscape thermodynamics. It is striking to find that the real-to-ideal strength gap results from both configurational and thermo-vibrational contributions to STZs. The former determines the upper bound, while the latter further decreases strengths to the lower bound. The results may shed new insight into metallic glass strength and flow. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：3119 / 3123

页数：5

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