Title :
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Evaluation of Residual Stresses in Bimetallic Welds
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Author :
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Rajesh
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Journal name :
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IJMRS's International Journal of Engineering Sciences, ISSN 2277-9698
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Volume :
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Volume 02, Issue 02, Jun. 2013
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Keywords :
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Welding, Temperature, Residual Stress, Tensile Strength.
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Abstract :
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Dissimilar metal joints between plates of mild steel and austenitic steel are widely used in various fields like nuclear power plant. failure analysis carried out on dissimilar joints and literature review have shown that a significant number of failure have occurred in the heat affected zone of the dissimilar welded joints residual stresses present in the welded joints are one of the main factors which cause failure in dissimilar welded joints. In the present study mild steel and austenitic stainless steel AISI-304 were joined by the gas tungsten arc weld process using an austenitic stainless steel AISI-309 filler metal. A buttering layer of ER-309 was laid on mild steel side to prevent carbon migration from mild steel to weld metal. Temperature measurement were determined by using the nickel and nickel & chrome thermocouples at various points on the dissimilar weld and obtained a profile w.r.t time. Residual stresses were determined in the dissimilar welded joints using stain gauge hole drilling method.
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