Multiple and extended shear band formation in MgCuGd metallic glass during high-pressure torsion

被引：13

作者：

Zheng, Baolong ^{[1
]}

Zhou, Yizhang ^{[1
]}

Mathaudhu, Suveen N. ^{[2
]}

Valiev, Ruslan Z. ^{[3
]}

Tsao, Chi Y. A. ^{[4
]}

Schoenung, Julie M. ^{[1
]}

Lavernia, Enrique J. ^{[1
]}

机构：

[1] Univ Calif Davis, Davis, CA 95616 USA

[2] US Army, Res Lab, Aberdeen Proving Ground, MD 21005 USA

[3] Ufa State Aviat Tech Univ, Ufa 450000, Russia

[4] Natl Cheng Kung Univ, Tainan 701, Taiwan

来源：

SCRIPTA MATERIALIA | 2014年 / 86卷

关键词：

Metallic glass; High-pressure torsion; Shear bands; Powder; DEFORMATION;

D O I：

10.1016/j.scriptamat.2014.04.023

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mg65Cu25Gd10 bulk metallic glass (BMG), containing a high density of intersecting extended shear bands (SBs), was fabricated from densification of amorphous powder via high-pressure torsion (HPT). The extended SBs, up to 400 nm in width and containing nanocrystalline structures, were studied by electron microscopy. The mechanisms responsible for the formation of the high density of extended SBs are discussed and related to the high hydrostatic pressure and shear strains imposed during HPT of BMGs. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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页码：24 / 27

页数：4

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