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Influence of surface treatments on surface layer properties, fatigue and corrosion fatigue performance of AA7075 T73
Faculty
Science
Year:
2012
Type of Publication:
Article
Pages:
61-66
Authors:
Mhaede, Mansour
DOI:
10.1016/j.matdes.2012.04.056
Journal:
MATERIALS \& DESIGN ELSEVIER SCI LTD
Volume:
41
Research Area:
Materials Science
ISSN
ISI:000305988100009
Keywords :
Surface treatments, Surface layer properties, Fatigue, Corrosion fatigue
Abstract:
Ball-burnishing (BB) and shot peening (SP) as surface treatments lead to local plastic deformations in near-surface regions, which result in development of residual stresses and changes in the surface topography. In this study, the effects of various process parameters of shot peening (SP) and ball-burnishing (BB) on the surface layer properties, i.e. surface roughness, microhardness and residual compressive stresses, fatigue and corrosion fatigue properties of Al-alloy AA7075 T73 were investigated. The results show pronounced enhancement in the fatigue life tested in ambient air as well as corrosion fatigue life tested in 3.5\% NaCl after both SP and BB compared to the electrolytically polished (EP) reference conditions. (C) 2012 Elsevier Ltd. All rights reserved.
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