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

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

1 MSMP - Mechanics surfaces and materials processing
2 IRT M2P - Institut de recherche technologique Matériaux Métallurgie et Procédés
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 popular mechanical surface treatment used in automotive and aeronautical industries to enhance life duration of mechanical parts by introducing compressive residual stresses. TRIP 780 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 number of cycles. A FEM model is also proposed to better understand the evolution of residual stresses in the first cycles.

Mots clés: TRIP Steel; Shot-Peening; Residual Stresses; Relaxation; TRIP Steel

Domaines: Matériaux

C. Mauduit, R. Kubler, Laurent Barrallier, Sophie Berveiller, Quentin Puydt, et al.. Analysis of Residual Stress Relaxation Under Mechanical Cyclic Loading of Shot-Peened TRIP780 Steel. ICRS 10, Jul 2016, Sydney, Australia. pp.85-90, ⟨10.21741/9781945291173-15⟩. ⟨hal-03157600v2⟩