Influence of the shot-peening intensity on the structure and near-surface mechanical properties of Ti40Zr10Cu38Pd12 bulk metallic glass

Shot-peening (SP) changes the near-surface structure and mechanical properties of a Ti40Zr10Cu38Pd12 bulk metallic glass. Near the surface, the hardness, Young's modulus, and elastic strain limit are all reduced. Measurements of the heat of relaxation show that an exceptionally high stored ener...

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Bibliographic Details
Published in:Applied physics letters 2013-11, Vol.103 (21)
Main Authors: González, S., Fornell, J., Pellicer, E., Suriñach, S., Baró, M. D., Greer, A. L., Belzunce, F. J., Sort, J.
Format: Article
Language:English
Subjects:
Amorphous materials
Applied physics
Bulk modulus
Cold storage
Elastic limit
Internal energy
Mechanical properties
Metallic glasses
Modulus of elasticity
Shot peening
Strain
Surface structure
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Summary:Shot-peening (SP) changes the near-surface structure and mechanical properties of a Ti40Zr10Cu38Pd12 bulk metallic glass. Near the surface, the hardness, Young's modulus, and elastic strain limit are all reduced. Measurements of the heat of relaxation show that an exceptionally high stored energy of cold work can be induced, implying a large increase in free volume. At the highest SP intensity there is partial nanocrystallization enabled by the increased free volume and not by the increase in temperature.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4833017