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

Lee, Chin Hyung; Park, H.C.; Jang, Gab-Chul; Lee, J.H.; Chang, Kyong-Ho

doi:10.4028/www.scientific.net/kem.353-358.527

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…As representative researches related to SM570TMC, Chang et al [7] introduced experimental and numerical investigations on residual stresses of SM570TMC. Lee et al [8] provided characteristics of high temperature tensile properties and residual stresses in welded joints.…”

Section: Introductionmentioning

confidence: 99%

Specimen Test of Large-Heat-Input Fusion Welding Method for Use of SM570TMCP

Lee¹,

Shin

2015

Advances in Materials Science and Engineering

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In this research, the large-heat-input welding conditions optimized to use the rear plate and the high-performance steel of SM570TMCP, a new kind of steel suitable for the requirements of prospective customers, are proposed. The goal of this research is to contribute to securing the welding fabrication optimized to use the high-strength steel and rear steel plates in the field of construction industry in the future. This research is judged to contribute to securing the welding fabrication optimized to use the high-strength steel and rear steel plates in the field of construction industry in the future.

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Section: Introductionmentioning

confidence: 99%

Specimen Test of Large-Heat-Input Fusion Welding Method for Use of SM570TMCP

Lee¹,

Shin

2015

Advances in Materials Science and Engineering

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Characterization on strength and toughness of welded joint for Q550 steel

Jiang

Wang

et al. 2011

Bull Mater Sci

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Q550 high strength steel was welded using gas shielded arc welding and three different welding wires without pre-or post-heat treatments. The paper investigates the influence of welding wire on the microstructure, tensile strength and impact toughness of Q550 steel weld joints. Results showed that the microstructure of the weld metal of joints produced using ER50-6 wire was a mixture of acicular ferrite and grain boundary ferrite including pro-eutectoid ferrite and ferrite side plate. Acicular ferrite was mainly obtained in the weld metal of the joints produced using MK·G60-1 wire. Pro-eutectoid ferrite was present along the boundary of prior austenite. Crack initiation occurred easily at pro-eutectoid ferrite when the joint was subjected to tensile. Tensile strength and impact toughness were promoted with increasing acicular ferrite. Tensile strength of the joint fabricated using MK·G60-1 wire was close to that of base metal. And tensile samples fractured at location of the fusion zone, which had lower toughness and thus became the weak region in the joint. Impact absorbing energy was the highest in the heat affected zone. Fibrous region in fracture surfaces of impact specimens was characterized as transgranular fracture with the mechanism of micro-void coalescence. Acicular ferrite microstructure region corresponded to relatively large dimples while boundary ferrite microstructure corresponded to small dimples.

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