The Impact of Induced Shot Peening Residual Stresses on Metallic Components of SAE 1020 Steel with Pre-Existing Compressive Stresses

• Published in: Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2024-01, Vol.27, p.1
• Main Authors: Gurova, Tetyana, Leontiev, Anatoli, Cunha, Tatiana Santos da, Matta, Patrícia dos Santos, Werner, Heitor Ferreira, Peripolli, Suzana Bottega, Baêta Júnior, Eustáquio de Souza
• Format: Article
• Language: English
• Subjects: Cementation; Compressive properties; Electropolishing; ENGINEERING, CHEMICAL; Heat treatment; Low carbon steels; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; Residual stress; residual stresses; Shot peening; Stress distribution; X-ray diffraction
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/1980-5373-mr-2023-0305

An experimental study on the distribution of residual stresses induced by shot peening on samples of SAE 1020 steel with pre-existing compressive stresses is presented. Two samples with similar geometries were subjected to a heat treatment to relieve stress. Then, one of the samples was subjected to a cementation process to introduce compressive residual stresses. Both samples, with and without cementation, were subjected to the same shot peening treatment. Using X-ray diffraction and electrolytic polishing to remove superficial layers, the depth-resolved residual stress distribution was obtained. It was concluded that the effect of pre-existing compressive stresses should be considered as a factor that influences the final distribution of the residual stresses induced by shot peening, namely the maximum of shot peening induced residual stresses moves closer to the surface in a sample with large initial compressive stresses and its value is greater than the maximum value for a specimen with lower initial compressive stresses.