A plastic Zr-Cu-Ag-Al bulk metallic glass

被引：59

作者：

Wang, X. ^{[1
,2
]}

Cao, Q. P. ^{[1
,2
]}

Chen, Y. M. ^{[3
]}

Hono, K. ^{[3
]}

Zhong, C. ^{[1
,2
]}

Jiang, Q. K. ^{[1
,2
]}

Nie, X. P. ^{[1
,2
]}

Chen, L. Y. ^{[1
,2
]}

Wang, X. D. ^{[1
,2
]}

Jiang, J. Z. ^{[1
,2
]}

机构：

[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Lab New Struct Mat, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

ACTA MATERIALIA | 2011年 / 59卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Metallic glasses; Mechanical property; Free volume; Pair distribution function; Shear band; IN-SITU FORMATION; FREE-VOLUME; PHASE-SEPARATION; STRUCTURAL RELAXATION; FORMING ABILITY; SHEAR BANDS; MICROSTRUCTURE; EMBRITTLEMENT; TRANSITION; BEHAVIOR;

D O I：

10.1016/j.actamat.2010.10.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An intrinsically plastic Zr53.8Cu31.6Ag7.0Al7.6 bulk metallic glass with large bending and compressive plastic strains was fabricated. Through transmission electron microscopy, three-dimensional atom probe and anomalous small-angle X-ray scattering techniques, the possibility of plasticity induced by microstructural and chemical inhomogeneity was ruled out in the as-cast alloy. The plasticity can change dramatically in a narrow composition range, even though all the other properties vary slightly or even do not change. In comparison with Zr46Cu37.6Ag8.4Al8, the increase in Zr content in Zr53.8Cu31.6Ag7.0Al7.6 results in an increased portion of the Zr-Zr atomic pair in the nearest shell of a pair distribution function. A steep peak profile on the right side of the pair distribution function in Zr53.8Cu31.6Ag7.0Al7.6 suggests that more atoms are involved upon yielding, and the opportunity of forming more shear bands increases. This finding may provide useful guidelines for the development of plastic metallic glasses from a structural aspect. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1037 / 1047

页数：11

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