Origin of strain hardening in monolithic metallic glasses

被引：18

作者：

Yuan, X. ^{[1
]}

Sopu, D. ^{[1
,2
]}

Eckert, J. ^{[1
,3
]}

机构：

[1] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[2] Tech Univ Darmstadt, Inst Mat Wissensch, Fachgebiet Mat Modellierung, Otto Berndt Str 3, D-64287 Darmstadt, Germany

[3] Mountanuniv Leoben, Dept Mat Sci, Chair Mat Phys, Jahnstr 12, A-8700 Leoben, Austria

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 14期

基金：

欧洲研究理事会;

关键词：

PLASTIC-FLOW; BEHAVIOR; COMPOSITES; TRANSITION; DUCTILITY; BRITTLE;

D O I：

10.1103/PhysRevB.103.L140107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To overcome the brittleness of metallic glasses (MGs), their structure, chemistry, or loading conditions are usually controlled. Here, the local stress state in MGs was modulated without affecting their structure. The elastically designed MG heterostructures provide enhanced ductility together with strain hardening during loading. The stress heterogeneity leads to shear band multiplication that consequently enhances the macroscopic ductility of MGs. In addition, the residual compressive stress significantly increases the strength of the glass and is responsible for the observed strain hardening.

引用

页数：5

共 38 条

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