Numerical Prediction on the Mechanical Behaviour of Laser Peened Bulk Metallic Glass

DOI

10.2991/cisia-15.2015.205How to use a DOI?

Keywords

finite element analysis; laser peening; bulk metallic glass; mechanical performance; free volume

Abstract

Laser peening is an innovative surface treatment technique similar to shot peening, but it can introduce deeper compressive residual stress layers to materials for improving their fatigue life and plasticity. In this paper, a three dimensional finite element model has been developed to numerically simulate the laser peening and subsequent three-point bending of a bulk metallic glass (Zr41.2Ti13.8Cu12.5Ni10Be22.5) beam by using Abaqus software. The constitutive relation used here is based on the free volume theory. Compared the laser peened beam with un-peened beam, the simulated results shown that the improvement in mechanical performance is attributed to the induced compressive residual stress and the free volume increase in the peened area. The yield strain and the yield strength of laser peened BMG are also increased. This research presents how laser peening improves the strength and plasticity of brittle and strain-softening bulk metallic glasses.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - J. Fu
AU  - H.G Shi
AU  - C. Zheng
AU  - Z. Ji
PY  - 2015/06
DA  - 2015/06
TI  - Numerical Prediction on the Mechanical Behaviour of Laser Peened Bulk Metallic Glass
BT  - Proceedings of the International Conference on Computer Information Systems and Industrial Applications
PB  - Atlantis Press
SP  - 754
EP  - 757
SN  - 2352-538X
UR  - https://doi.org/10.2991/cisia-15.2015.205
DO  - 10.2991/cisia-15.2015.205
ID  - Fu2015/06
ER  -