Steady-state serrated deformation of metallic glass during indentation

SCRIPTA MATERIALIA

卷:61

Article

Ng, K. Y.¹  Zuo, L.¹  Ngan, A. H. W.¹ 

[1] Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

关键词: Nanoindentation;    Strain rate;    Plastic deformation;    Bulk metallic glass (BMG);   

DOI  :  10.1016/j.scriptamat.2009.07.036

来源: Elsevier

【 摘 要 】

Using an exponential load profile with a Berkovich tip, the strain bursts produced during nanoindentation of a (Cu(55)Mg(33)Y(12))-Be bulk metallic glass are found to reach a steady state, in which the hardness becomes constant, the displacement jumps normalized by the indent depth approach a constant range 1.4 +/- 1.2% and correspond to a reduction in hardness of 2.8 +/- 2.4%, and the interburst duration multiplied by the strain rate approaches a constant range 1: 8 +/- 0: 6%. This steady-state behavior is insensitive to the strain rate used. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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