Effects of shot-peening residual stresses on the fracture and crack-growth properties of D6AC steelThe fracture strength and cyclic crack-growth properties of surface-flawed, shot-peened D6AC steel plate were investigated. For short crack lengths (up to 1.5 mm) simple linear elastic fracture mechanics - based only on applied loading - did not predict the fracture strengths. Also, Paris' Law for cyclic crack growth did not correlate the crack-growth behavior. To investigate the effect of shot-peening, additional fracture and crack-growth tests were performed on material which was precompressed to remove the residual stresses left by the shot-peening. Both tests and analysis show that shot-peening residual stresses influence the fracture and crack-growth properties of the material. This report presents the analytical method of compensating for residual stresses and the fracture and cyclic crack-growth test results and predictions.
Document ID
19750031905
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Elber, W. (NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Subject Category
Metallic Materials
Meeting Information
Meeting: Fracture toughness and slow-stable cracking; National Symposium on Fracture Mechanics