Effects of Laser and Shot Peening on Fatigue Crack Growth in Friction Stir Welds

Author:: Forman, Royce
Published:: May 14, 2006.
Physical Description:: 1 electronic document
Additional Creators:: Hatamleh, Omar and Lyons, Jed

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Summary:

The effects of laser, and shot peening on the fatigue life of Friction Stir Welds (FSW) have been investigated. The surface roughness resulting from various peening techniques was assessed, and the fracture surfaces microstructure was characterized. Laser peening resulted in an increase in fatigue life approximately 60%, while shot peening resulted in 10% increase when compared to the unpeened material. The surface roughness of shot peening was significantly higher compared to the base material, while specimens processed with laser peening were relatively smooth.

Other Subject(s):

Mechanical Engineering

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 20080029394.
2006 International Fatigue Congress; 14-16 May 2006; Atlanta, GA; United States.

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View MARC record | catkey: 15999409