A Novel Micro-Scale Plastic Deformation Feature on a Bulk Metallic Glass Surface under Laser Shock Peening

Laser shocking peening is a widely applied surface treatment technique that can effectively improve the fatigue properties of metal parts. We observe many micro-scale arc plastic steps on the surface of Zr sub(47.9)Ti sub(0.3)Ni sub(3.1)Cu sub(39.3)Al sub(9.4) metallic glass subjected to the ultra-h...

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Published in:Chinese physics letters 2013-03, Vol.30 (3), p.36201-1-036201-4
Main Authors: Wei, Yan-Peng, Wei, Bing-Chen, Wang, Xi, Xu, Guang-Yue, Li, Lei, Wu, Xian-Qian, Song, Hong-Wei, Huang, Chen-Guang
Format: Article
Language:English
Subjects:
Amorphous materials
Boundaries
Laser shock processing
Metallic glasses
Microscopy
Peening
Plastic deformation
Strain rate
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description Laser shocking peening is a widely applied surface treatment technique that can effectively improve the fatigue properties of metal parts. We observe many micro-scale arc plastic steps on the surface of Zr sub(47.9)Ti sub(0.3)Ni sub(3.1)Cu sub(39.3)Al sub(9.4) metallic glass subjected to the ultra-high pressure and strain rate induced by laser shock peening. The scanning electronic microscopy and atomic force microscopy show that the arc plastic step (APS) has an arc boundary, 50-300 nm step height, 5-50 mu m radius and no preferable direction. These APSs have the ability to accommodate plastic deformation in the same way as shear band. This may indicate a new mechanism to accommodate the plastic deformation in amorphous metallic glass under high pressure, ultra-high strain rates, and short duration.
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subjects Amorphous materials
Boundaries
Laser shock processing
Metallic glasses
Microscopy
Peening
Plastic deformation
Strain rate
title A Novel Micro-Scale Plastic Deformation Feature on a Bulk Metallic Glass Surface under Laser Shock Peening
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