Metals · 2015 · 49 citations · 27 references
EngineeringMaterials EngineeringMaterials ScienceJoiningMechanical Behavior Of MaterialsMetallurgyAlloysJoining Of Automotive MaterialsPhysical MetallurgyResistance WeldingWeldingWelding ProcessesAutomotive Joining ApplicationsHardnessMartensitic MicrostructureMicrostructureMicrostructure Evolution In WeldsResistance Spot WeldingWeld MicrostructureWelded Joints
Resistance spot welding (RSW) as a predominant welding technique used for joining steels in automotive applications needs to be studied carefully in order to improve the mechanical properties of the spot welds. The objectives of the present work are to characterize the resistance spot weldment of DP600 sheet steels. The mechanical properties of the welded joints were evaluated using tensile-shear and cross-tensile tests. The time-temperature evolution during the welding cycle was measured. The microstructures observed in different sites of the welds were correlated to thermal history recorded by thermocouples in the corresponding areas. It was found that cracks initiated in the periphery region of weld nuggets with a martensitic microstructure and a pull-out failure mode was observed. It was also concluded that tempering during RSW was the main reason for hardness decrease in HAZ.
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Ali Ramazani, Krishnendu Mukherjee, Alexander Schwedt et al. · International Journal of Plasticity · 2012 · 257 citations
Natural Sciences, Materials Engineering, Mechanical Engineering +16
Microstructure and fracture characteristics of spot-welded DP600 steel
Chao Ma, D.L. Chen, S.D. Bhole et al. · Materials Science and Engineering A · 2007 · 213 citations