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Experimental Investigation of Dissimilar Metal Weld of SA335 P11 and SA312 TP304 Formed by Gas Tungsten Arc Welding (GTAW)

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Abstract

Dissimilar metal welds are widely used in process industries for applications such as pressure vessels, reactors, reheaters and heat exchangers. This helps in getting tailor-made properties in components required some heterogeneous working conditions. Joining of dissimilar metals has drawn great interest due to the challenges posed by variation in material composition and characteristics of joining metals. The present study empirically investigates the gas tungsten arc welding (GTAW) parameters to probe their effect on the mechanical and metallurgical behaviour of welded joints of SA335 P11 and SA312 TP304 alloys. Tensile test, hardness measurement and microstructure investigations were performed to check weld strength. The welded joint showed higher strengths than base metals due to carbide formation in weld zone. The strength of joint remains unchanged after heat treatment, whereas increase in hardness was observed due to grain boundary carbide precipitation. The present investigation determines that GTAW technique would be successfully used to join these particular dissimilar alloys.

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Authors and Affiliations

  1. Department of Mechanical Engineering, MPSTME, SVKM’s Narsee Monjee Institute of Management Studies (NMIMS), Shirpur Campus, Shirpur, Maharashtra, 425405, India

    Rakesh Chaudhari

  2. Department of Mechanical Engineering, MPSTME, SVKM’s Narsee Monjee Institute of Management Studies (NMIMS), Mumbai Campus, Mumbai, Maharashtra, 400056, India

    Asha Ingle

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  1. Rakesh Chaudhari
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  2. Asha Ingle
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Correspondence to Rakesh Chaudhari.

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Chaudhari, R., Ingle, A. Experimental Investigation of Dissimilar Metal Weld of SA335 P11 and SA312 TP304 Formed by Gas Tungsten Arc Welding (GTAW). Trans Indian Inst Met 72, 1145–1152 (2019). https://doi.org/10.1007/s12666-019-01587-2

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  • DOI: https://doi.org/10.1007/s12666-019-01587-2

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