Investigation on fatigue fracture behaviors of spot welded Q&P980 steel
Source abstract
Abstract
Abstract Microstructural characterization, micro-hardness tests, tensile and fatigue tests of spot welded Q&P980 steel were performed using tensile-shear and cross-tension specimens. The hardness values of nugget and base material were measured to be 497 HV and 334 HV, respectively. It is found that the fatigue cracks in heat affected zone (HAZ) initiate at the interface between two sheets. The fatigue failure modes consist of the fracture along the circumference or along the direction of width for tensile-shear specimens and pullout or fracture along the direction of width for cross-tension specimens. It is also found that the fatigue properties of spot welded Q&P980 and DP780 specimens are approximately the same in the case of tensile-shear and cross-tension specimens.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Advanced Welding Techniques Analysis · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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