Abstract
The contribution of residual compressive stresses induced by shot peening to the improvement in fatigue life of Al 2024 is assessed. Shot peening results in an increase in dislocation density and in compressive residual stresses at the surface. Propagation rates of small surface cracks were measured in the electrolytically polished (reference) and shot peened conditions, and were found to be drastically reduced after shot peening. A minimum in propagation rates for shot peened specimens is found where the cracks propagate through the region of maximum residual compressive stresses. Comparison of these results with those of other materials indicates that the effect of residual compressive stresses on fatigue life in Al 2024 is far more pronounced than has been previously thought.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
