Structural relaxation in a heavily cold-worked metallic glass

被引：41
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
收藏
页码：1243 / 1246
页数：4
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