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: The behavior and effect of a plasma plume on the weld penetration are greatly different between CO2 laser welding and YAG, disk or fiber laser welding as discussed by the authors, and the effects of the power and the power density on the welding penetration are elucidated.
188 citations
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TL;DR: In this article, a single-mode continuous-wave fiber laser was used in butt welding of Ti-6Al-4V to Inconel 718, and the results showed that the formation of intermetallic brittle phases and welding defects could be effectively restricted at welding conditions produced by the combination of higher laser power, higher welding speed and shifting the laser beam from the interface to the Inconels 718 alloy side.
Abstract: Challenges in dissimilar materials welding are the differences of physical and chemical properties between welding materials and the formation of intermetallic brittle phases resulting in the degradation of mechanical properties of welds. However, dissimilar materials welding is increasingly demanded from the industry as it can effectively reduce material costs and improve the design. In aerospace applications, Ti-6Al-4V titanium alloy and Inconel 718 nickel alloy have been widely used because of their superior corrosion resistance and mechanical properties. In this study, a single-mode continuous-wave fibre laser was used in butt welding of Ti-6Al-4V to Inconel 718. Investigations including metallurgical and mechanical examinations were carried out by means of varying processing parameters, such as laser power, welding speed and the laser beam offset position from the interface of the metals. Simple analytical modelling analysis was undertaken to explain the phenomena that occurred in this process. Results showed that the formation of intermetallic brittle phases and welding defects could be effectively restricted at welding conditions produced by the combination of higher laser power, higher welding speed and shifting the laser beam from the interface to the Inconel 718 alloy side. The amount of heat input and position of laser beam to improve the Ti-6Al-4V/Inconel 718 weld quality are suggested.
184 citations
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TL;DR: In this article, the effects of welding speed on surface morphology and shape, welding defects, microstructure, hardness and tensile properties are investigated using a 4kW Nd:YAG laser system.
183 citations
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TL;DR: In this article, the effects of various welding parameters on welding penetration in Erdemir 6842 steel having 2.5mm thickness welded by robotic gas metal arc welding were investigated.
182 citations
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TL;DR: In this paper, the effects of welding current and time on the tensile-peel strength and tensile shear strength of welding joint in electrical resistance spot welding of chromided micro-alloyed steel sheets having 0.8 mm thickness and galvanized chromided chromided nano-alloysed steel sheet having 1.0 mm thickness were investigated.
181 citations