Dynamic softening and indentation size effect in a Zr-based bulk glass-forming alloy

被引：91
作者：
Van Steenberge, N.
Sort, J. [1 ]
Concustell, A.
Das, J.
Scudino, S.
Surinach, S.
Eckert, J.
Baro, M. D.
机构：
[1] Univ Autonoma Barcelona, Inst Catalana Recerca & Estudis Avancats, Bellaterra 08193, Spain
[2] Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Spain
[3] IFW Dresden, Inst Festkorperanalyt & Strukturforsch, D-01171 Dresden, Germany
来源：
SCRIPTA MATERIALIA | 2007年 / 56卷 / 07期
关键词：
metallic glass; hardness; nanoindentation; mechanical softening;
D O I：
10.1016/j.scriptamat.2006.12.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A dynamic mechanical softening is observed in a Zr-based bulk glass-forming alloy during nanoindentation. This softening causes a so-called indentation size effect (ISE), i.e. a reduction of strength as the applied load increases. The ISE is more pronounced in the as-cast alloy than in its thermally relaxed state. These observations, together with an increase in the overall hardness after relaxation, are ascribed to the interplay between the annealing-induced reduction of free volume and the creation of excess free volume during deformation. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：605 / 608
页数：4
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