Topic
Heat-affected zone
About: Heat-affected zone is a research topic. Over the lifetime, 18787 publications have been published within this topic receiving 231744 citations.
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TL;DR: In this article, T92 martensitic steel and S304H austenitic steel were welded by gas tungsten arc welding (GTAW) process and the results showed that the part of the joints with relatively weak tensile strength was T92 coarse-grained heat affected zone (CGHAZ), while the other part of joints which revealed relatively weak toughness was weld metal.
78 citations
TL;DR: In this paper, the influence of ultrasonic vibration on the formation, microstructure and mechanical properties of butt welded 2024Al-T4 joints was investigated, and the underlying mechanism of UVeFSW by experimental methods.
Abstract: Ultrasonic vibration enhanced friction stir welding (UVeFSW) is a new variant of friction stir welding (FSW) in which a sonotrode transmits ultrasonic energy directly into the localised area of the workpiece near and ahead of the rotating tool. This study investigated the influence of ultrasonic vibration on the formation, microstructure and mechanical properties of butt welded 2024Al-T4 joints, and attempted to unveil the underlying mechanism of UVeFSW by experimental methods. Morphology inspection, X-ray detection and metallographic inspection of the welds revealed that ultrasonic vibration can improve the weld formation at higher welding speeds. The stir zone in the UVeFSW broadened, while the grains in the heat affected zone had no obvious growth contrary to that in the base metal. Results of the mechanical tests indicated that the tensile strength and elongation of joints, and the microhardness value in the stir zone increased at the same welding parameters.
78 citations
TL;DR: In this article, the thermal effects of friction welding of two dissimilar materials, two rods are welded together by holding one of them still while rotating the other under the influence of an axial load which creates frictional heat in the interface.
78 citations
TL;DR: In this article, a static shoulder friction stir welding (SSFSW) joint was successfully performed on 7075-T651 aluminum alloy and defect-free joints with smooth weld surface were obtained.
78 citations
TL;DR: In this article, the effects of switching over from gas tungsten arc welding (GTAW) to pulsed current Gas Tungsten Arc Welding (PCGTAw) on the quality of joints produced in Hastelloy C-276 material were investigated.
78 citations