The effect of hole drilling on fatigue and residual stress properties of shot-peened aluminum panels |
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| Authors: | J Chaudhuri B S Donley V Gondhalekar K M Patni |
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| Affiliation: | (1) Mechanical Engineering Department, Wichita State University, KS 67260 Wichita, USA;(2) Cessna Aircraft Company, KS 67277 Wichita, USA |
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| Abstract: | The effect of hole drilling after shot peening on the fatigue life and residual stress state of selected aluminum alloys was
investigated. Compared to the unpeened condition, the hole drilling after shot peening reduced the fatigue life of the 2024-T351
and 2324-T39 alloys to a small extent. On the other hand, the fatigue life of 7150-T7751 decreased considerably due to hole
drilling after shot peening.
A compressive residual stress was at the surface of the shot peened specimens. Hole drilling reduced the compressive residual
stress by 60%. The excess dislocation density was mostly concentrated at the surface of the specimens. |
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| Keywords: | dislocation density effect of hole drilling after shot-peening residual stress shot-peened aluminum panels x-ray rocking curves |
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