Effect of oxide-based fluxes on mechanical and metallurgical properties of Dissimilar Activating Flux Assisted-Tungsten Inert Gas Welds |
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| Institution: | 1. L.D.R.P.-I.T.R., Gandhinagar, Gujarat, India;2. Department of Mechanical Engineering, SOT, Pandit Deendayal Petroleum University, Gandhinagar-7, Gujarat, India;1. State Key Lab of Mechanical Transmission, Chongqing University, Chongqing 400030, China;2. State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou 730050, China;2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;3. Lanzhou LS Heavy Equipment Co., LTD., Lanzhou 730050, China;1. Department of Mechanical Engineering, Amity University Madhya Pradesh, Gwalior, India;2. Department of Mechanical Engineering, BIT Sindri, Dhanbad, India;3. Department of Mechanical Engineering, National Institute of Technology Srinagar, Jammu and Kashmir, India;4. Department of Mechanical Engineering, PDPM Indian Institute of Information Technology, Design and Manufacturing Jabalpur, India |
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| Abstract: | Present investigation is to study the “Effect of Activating Fluxes on Mechanical and Metallurgical Properties of Dissimilar Activated Flux-Tungsten Inert Gas Welds”. Effect of current, welding speed, joint gap and electrode diameter on weld bead dimensions on 6 mm thick dissimilar weld between carbon steel to stainless steel, was studied under Activated Flux-Tungsten Inert Gas Welding process. During this investigation three different types of oxide powders were used-TiO2, ZnO and MnO2. After welding samples were subject to mechanical testing, in addition to characterization via micro hardness and microstructures of Normal Tungsten Inert Gas Welds and Activated Flux-Tungsten Inert Gas Welds. Activating fluxes TiO2 and ZnO are effective fluxes for Activated Flux-Tungsten Inert Gas Welding of dissimilar weld between CS to SS. Highest depth/width (D/W) ratio reported under TiO2 and ZnO fluxes compare to Normal-Tungsten Inert Gas Welds. Lowest angular distortion was observed under TiO2 flux compare to Normal-Tungsten Inert Gas Welds. Mechanical properties, Joint Efficiency of Activated Flux-Tungsten Inert Gas Welds are higher than normal-Normal Tungsten Inert Gas Welds. Tensile Test specimens of both the processes failed from the parent metal (carbon steel side). Carbon migration from CS to SS, had occurred which led to failure of weld joints from CS side. |
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| Keywords: | Dissimilar joints A-TIG Stainless steel SS304 Carbon steel Oxide fluxes |
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