Analysis of Residual Stress Relaxation Under Mechanical Cyclic Loading of Shot-Peened TRIP780 Steel

Clément Mauduit (1, 2) , Régis Kubler (2) , Laurent Barrallier (2) , Sophie Berveiller (3) , Quentin Puydt (1) , Martine Monin (4) , Bastien Weber (5)

1 IRT M2P - Institut de recherche technologique Matériaux Métallurgie et Procédés
2 MSMP - Mechanics surfaces and materials processing
3 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
4 PSA Peugeot Citroën
5 ArcelorMittal Maizières Research SA

Shot-peening is a common mechanical surface treatment used in automotive and aeronautical industries to enhance life duration of mechanical parts by introducing compressiveresidual stresses. TRIP780 steel fatigue type specimens are shot-peened and loaded under cyclic bending. The martensite phase transformation and the evolution of residual stresses in the different phases are determined by XRD at different numbers of cycles. A FEM model is also proposed to better understand the evolution of residual stresses in the first cycles.

Domaines: Matériaux; Mécanique des matériaux [physics.class-ph]; Génie des procédés

Clément Mauduit, Régis Kubler, Laurent Barrallier, Sophie Berveiller, Quentin Puydt, et al.. Analysis of Residual Stress Relaxation Under Mechanical Cyclic Loading of Shot-Peened TRIP780 Steel. Materials Research Proceedings, 2016, sydney, Australia. pp.85-90. ⟨hal-03157600v1⟩