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Effect of Welding Parameters on TIG Welding of Inconel 718 to AISI 4140 Steel

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Abstract

The combination of Inconel 718 with AISI 4140 steel joint is in continuous demand for various applications. The difference in the physical and metallurgical properties between the two materials lead to difficulty in joining with conventional fusion welding methods. TIG welding is a suitable welding method to join such materials without any major issues. Therefore, the welding parameter effects on mechanical properties were studied experimentally and using the response surface methodology model. The microstructural characteristics and fracture surfaces of the welds were analyzed using the optical and scanning electron microscope. The reactions between the filler metal and substrates were evaluated by the electron probe microanalyzer for the presence of secondary phases. The formation of equiaxed and cellular dendritic growth of microstructure was observed from the welds. The fractography analysis investigated the ductile mode of failure after lap shear and fatigue tests.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Acharya Nagarjuna University, Guntur, Andhra Pradesh, 522510, India

    M. Anuradha

  2. Department of Mechanical Engineering, RVR & JC College of Engineering, Guntur, Andhra Pradesh, 522019, India

    Vemulapalli Chittaranjan Das

  3. Department of Mechanical Engineering, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, 600025, India

    P. Susila

  4. Super-TIG Welding Co., Limited, Busan, 48547, Republic of Korea

    Muralimohan Cheepu

  5. Department of Mechanical Engineering, Marri Laxman Reddy Institute of Technology and Management, Hyderabad, Telangana, 500043, India

    D. Venkateswarlu

Authors
  1. M. Anuradha
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  2. Vemulapalli Chittaranjan Das
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  3. P. Susila
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  4. Muralimohan Cheepu
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  5. D. Venkateswarlu
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Correspondence to P. Susila.

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P. Susila: On-deputation to BIT Campus, Anna University Trichy.

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Anuradha, M., Das, V.C., Susila, P. et al. Effect of Welding Parameters on TIG Welding of Inconel 718 to AISI 4140 Steel. Trans Indian Inst Met 73, 1515–1520 (2020). https://doi.org/10.1007/s12666-020-01926-8

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  • DOI: https://doi.org/10.1007/s12666-020-01926-8

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