Nanoscale periodic corrugation to dimple transition due to beat in a bulk metallic glass

SCRIPTA MATERIALIA

卷:62

Article

Jiang, M. Q.¹  Ling, Z.¹  Meng, J. X.¹  Gao, J. B.²  Dai, L. H.¹ 

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[2] PMB Intelligence LLC, W Lafayette, IN 47996 USA

关键词: Bulk metallic glasses;    Fracture;    Energy dissipation;    Beat phenomenon;   

DOI  :  10.1016/j.scriptamat.2009.12.046

来源: Elsevier

【 摘 要 】

We report an intriguing observation that the interaction of brittle nanoscale periodic corrugations (NPCs) can lead to the formation of ductile dimples on the dynamic fracture surface of a tough Vit 1 bulk metallic glass (BMG) under high-velocity plate impact. A beat phenomenon due to superposition of simple harmonic vibrations, approximately characterizing NPCs, is proposed to explain this unusual brittle-to-ductile transition. The present results agree well with our previously revealed energy dissipation mechanism in the fracture of BMGs. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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