Residual stress field in steel samples during plastic deformation and recovery processes

Roman Wawszczak (1) , Andrzej Baczmanski (2) , Chedly Braham (3) , Wilfrid Seiler (3) , Mirosław Wróbel (4) , Krzysztof Wierzbanowski (1) , Alain Lodini (5)

1 Faculty of Physics and Applied Computer science
2 Faculty of Physics and Applied Computer Science
3 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
4 Metal Engeenering and Industrial Computer Science
5 LACMDTI

X-ray diffraction method was applied to measure residual stresses and stored elastic energy in deformed and annealed polycrystalline ferritic and austenitic steel samples. Orientation distribution of incompatibility stresses created during elastoplastic deformation was determined and presented in Euler space. Using deformation models, the second order stresses were correlated with different types of intergranular interactions occurring in the studied materials. An important decrease of the first and the second order residual stresses was observed during recovery and recrystallization processes. Diffraction peaks related to dislocations density were studied and correlated with stress variation during annealing process. Differences in stress relaxation between ferritic and austenitic samples were explained by different values of the stacking fault energy, which influences climb of dislocations.

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]

Roman Wawszczak, Andrzej Baczmanski, Chedly Braham, Wilfrid Seiler, Mirosław Wróbel, et al.. Residual stress field in steel samples during plastic deformation and recovery processes. Philosophical Magazine, 2011, pp.1. ⟨10.1080/14786435.2011.557401⟩. ⟨hal-00677965⟩