Huge reduction of Young's modulus near a shear band in metallic glass

被引：18

作者：

Ketov, S. V. ^{[1
]}

Nguyen, H. K. ^{[1
]}

Trifonov, A. S. ^{[2
,3
,4
]}

Nakajima, K. ^{[1
]}

Louzguine-Luzgin, D. V. ^{[1
]}

机构：

[1] Tohoku Univ, WPI Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, GSP-1, Moscow 119991, Russia

[3] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

[4] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 687卷

关键词：

Bulk metallic glass; Shear band; Young's modulus; Quantitative nanomechanical mapping; FREE-VOLUME; DEFORMATION; NANOINDENTATION; PRESSURE; STRESS; ALLOYS; FE;

D O I：

10.1016/j.jallcom.2016.06.116

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：

A Zr-based bulk metallic glassy sample was subjected to the mechanical compression test at room temperature. The elastic modulus variation in the surface regions near and far from a shear band with a shear step of about 2 gm was measured using the atomic force microscope (AEM) quantitative nano mechanical mapping method. It was found that Young's modulus decreases gradually towards the shear bands mid-plane on the micrometer scale. Maximum decrease in the Young's modulus near the shear band's central region is about 70% on nanometer scale. Such a huge increase in elasticity close to the central plane of the shear band is attributed to the generation and migration of the excess volume during the shear band operation and possible formation of nanovoids. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：221 / 226

页数：6

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