Austenitizing Temperature Effects on the Martensitic Transformation and its Influence on Simulated Welding Residual Stresses in a Microalloyed-Steel
نویسندگان
چکیده
This study focused on the effects of different peak (austenitizing) temperatures (Tp) over martensite start temperature (Ms) and its influence final residual stresses after welding simulation. For this purpose, expansion coefficients obtained through physical (dilatometric) simulations a high-strength low-alloy steel were considered for three temperatures: 1300 °C, 1150 920 °C cooling rate 25 °C/s. Aiming at clarifying phenomenon behind GTAW welding, one carried out nonlinear transient thermomechanical finite-element (FE) analyses to reconstitute process simulate subsequent formation in HAZ. Once heat source simulation was calibrated, four material models created, each Tp, fourth model considering constant coefficient, without transformation comparison. A Three-bar evaluated isolate Tp stresses. composite plate also considered, which sheet HAZ subdivided according reached temperature, respective applied. The results show importance welding-induced stress clear trend decreasing tensions with lowering especially
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ژورنال
عنوان ژورنال: Materials Research-ibero-american Journal of Materials
سال: 2023
ISSN: ['1980-5373', '1516-1439']
DOI: https://doi.org/10.1590/1980-5373-mr-2022-0624