Structural relaxation in a heavily cold-worked metallic glass

被引：43

作者：

Mear, F. O. ^{[1
]}

Lenk, B. ^{[1
]}

Zhang, Y. ^{[1
]}

Greer, A. L. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 12期

关键词：

Differential scanning calorimetry; Metallic glass; Plastic deformation; Shear bands; Structural relaxation;

D O I：

10.1016/j.scriptamat.2008.08.023

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Differential scanning calorimetry heating runs on as-cast and shot-peened bulk metallic glass Pd40Cu30Ni10P20 show a broad temperature range of heat release (relaxation spectrum) with two peaks. The higher-temperature peak is reduced by shot-peening, suggesting uniform deformation and partial relaxation of the glassy structure. Peening of pre-annealed samples shows the stored energy of cold work to be a few per cent of the work done. Peening increases atomic mobility, revealed by a downward temperature shift of the relaxation spectrum. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1243 / 1246

页数：4

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