Investigation the weld quality characterizations and temperature field in laser welding of dissimilar Nickle-base alloy Inconel 600 and duplex stainless steel
Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical EngineeringAhmad Soleimani 1 , Mohammad Akbari 2 , Arash Karimipour 3 , Amir Homayoun Meghdadi 4 , Reza Nosouhi 5
1 - Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2 - Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
3 - Najafabad Branch,Islamic Azad UniversityMechanical Engineering Department
4 - Associate Professor
5 - Department of Mechanical Engineering, Faculty of Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran
Keywords: dissimilar materials, laser welding, Inconel 600 superalloy, duplex stainless steel, molten pool,
Abstract :
laser welding of dissimilar materials joint composed of Inconel 600 superalloy and stainless steel of duplex 2205 was performed via experimental design to analyze the weld quality characterization including the weld penetration depth and width and the microstructural variation at different regions of the weld bead. The process parameters impact on the temperature gradient near the boundary line of the fusion zone and base metals of both material according to the variation of focal distance, beam deviation direction to each material and welding speed were investigated. Additionally, variation in weld bead width, depth of weld penetration and appearance of weld bead surface were investigated according to the mentioned process parameters. The results imply that by moving the laser beam in direction of the duplex steel the width of the melt pool was more than that of super alloy 600. Due to the laser beam's high energy density and the melt pool depth remained relatively unchanged when welding at the focal point, as opposed to welding at higher focal distances. With the interaction effect of laser beam deflection of towards the Inconel 600 and increasing focal length due to a lower absorption coefficient and a significant reduction in energy density, the maximum reduction rate of molten pool depth was observed. The maximum weld bead width occurs at the place of laser beam radiation at the center line of the of two parts junction.
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