Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 270, Issue -, Pages 182-194Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2019.02.031
Keywords
TRIP steel; Shot peening; Residual stresses; Martensitic transformation; Finite element analysis
Funding
- French Technological Research Institute for Materials, Metallurgy and Processes (IRT M2P) under the CONDOR project
- IRT M2P
- PSA Group
- ArcelorMittal
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This study aims at the experimental and numerical analysis of TRIP780 steel after conventional shot peening. TRIP steels exhibit a multiphase microstructure with martensitic transformation of the retained austenite during shot peening. In-depth experimental analysis are carried out with microhardness and X-ray diffraction. Residual stresses profiles are determined in the pseudo-ferritic phases (alpha + alpha') and in the retained austenite gamma. A representative finite element model of shot peening with a material behavior law describing the multiphase microstructure and the martensitic phase transformation during loading is proposed. The results are compared to experimental data and the effect of martensitic transformation is numerically investigated.
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