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Investigation on surface layer characteristics of shot peened graphene reinforced Al composite by X-ray diffraction method

journal contribution
posted on 2018-03-30, 00:00 authored by K Zhan, Y Wu, J Li, B Zhao, Y Yan, Lechun Xie, L Wang, V Ji
Graphene reinforced Al composite with high mechanical property was successfully reported. However, there are quite limited studies about shot peening effect on this new type material. Here, 1.0 wt% graphene reinforced Al composite was produced by powder metallurgy and treated by shot peening. The surface layer characteristics of shot peened composite was investigated by X-ray diffraction line profile analysis. The microstructure including domain size, micro-strain, dislocation density and crystalline texture were analyzed. The results showed that after surface shot-peening, the domain size were refined, the dislocation density of the composite was increased sharply to 9.0 × 1011/cm2at the top surface. The original strong texture was diminished after shot peening. Based on the calculated results, the microstructure variation of composite was more severe than that of Al without graphene reinforcement after shot peening. Besides, the micro-hardness of composite at the top surface increased up to 75HV one time higher than that of matrix. It is concluded that shot peening can be considered as an essential process of improving the surface properties of graphene reinforced Al composite.

History

Journal

Applied surface science

Volume

435

Pagination

1257 - 1264

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0169-4332

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2017, Elsevier