Marciszko-Wiackowska, M.; Baczmanski, A.; Apel, D.; Klaus, M.; Genzel, C.; Chemkhi, M.; Saferna, M.; Wierzbanowski, K.; Kawalko, J.; Le Joncour, L.; Francois, M.; Bala, P.: Angle- and energy-dispersive diffraction used to determine stress evolution in 17-4 PH stainless steel produced by ADAM and subjected to SMAT processing. Journal of Applied Crystallography 58 (2025), p. 2049-2065
10.1107/s160057672500980x
Abstract:
In this study, the evolution of residual stress and elastic anisotropy in 17–4 PH stainless steel produced by atomic diffusion additive manufacturing (ADAM) and then subjected to surface mechanical attrition treatment (SMAT) was investigated. Angle- and energy-dispersive X-ray diffraction techniques were employed to analyse the residual stress profiles in both the as-built and SMAT-processed samples. The results reveal that SMAT introduces compressive residual stresses while refining the material subgrain structure. Residual stress analysis indicates that the as-built sample exhibits tensile stresses near the surface, which gradually decrease with depth. In contrast, the SMAT-processed sample shows compressive stresses, ranging from −200 MPa at the surface to −600 MPa in deeper regions. This study highlights the critical role of selecting an appropriate grain-interaction model for X-ray stress factor calculation to ensure accurate residual stress characterization, which is essential for the reliability and performance of additively manufactured components, particularly applications with high-level loading.