Analysis of Residual Stress Relaxation Under Mechanical Cyclic Loading of Shot-Peened TRIP780 Steel
Communication avec acte
Author
MAUDUIT, ClémentPUYDT, QuentinMONIN, MartineWEBER, Bastien 
BERVEILLER, SophieBARRALLIER, Laurent KUBLER, RegisAbstract
Shot-peening is a common mechanical surface treatment used in automotive and aeronautical industries to enhance life duration of mechanical parts by introducing compressive residual stresses. TRIP 780 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.
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