Characteristics of High Temperature Tensile Properties and Residual Stresses in Welded Joints of the SM570-TMCP Steel

Abstract:

TMCP steels produced by thermo-mechanical control process are now spot lighted due to the excellent combinations of strength, toughness and weldability. Recently, in Korea, high strength SM570-TMCP steel whose tensile strength is 600MPa has been developed and applied to steel structures due to its excellent nature. But, for the application of the TMCP steel to steel structures, it is necessary to elucidate not only the material characteristics but the mechanical characteristics of welded joints. In this study, high temperature tensile properties of the SM570-TMCP steel were investigated through the elevated temperature tensile test and the characteristics of residual stresses in welded joints of the TMCP steel were studied through the three-dimensional (3-D) thermal elastic-plastic finite element (FE) analysis on the basis of mechanical properties at high temperatures obtained from the experiment. The results are then compared with the conventional quenched and tempered high strength SM570 steel.

• Periodical: Key Engineering Materials (Volumes 353-358)
• Pages: 527-532
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.353-358.527
• Online since: September 2007
• Authors: Chin Hyung Lee, H.C. Park, Gab Chul Jang, J.H. Lee, Kyong Ho Chang
• Keywords: 3-D Thermal Elastic-Plastic FE Analysis, Elevated Temperature Tensile Test, High Temperature Tensile Properties, Residual Stress, TMCP Steel

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