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    Volume 7, Issue 1 (April 2018)

    Thermo-Mechanical Analysis of Activated Tungsten Inert Gas Welding (A-TIG) of Type 316LN Stainless Steel Thin Plates

    (Received 12 September 2017; accepted 13 December 2017)

    Published Online: 16 April 2018

    CODEN: MPCACD

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    Abstract

    In the present study, thermo-mechanical behavior of 316LN stainless steel thin plates during activated tungsten inert gas (A-TIG) welding was investigated using SYSWELD®. A-TIG welding was carried out with more reduced heat input for fabricating 3-mm-thick 316LN stainless steel plates than that of the conventional TIG welding process. Induced transient temperature during welding was measured using a K-type thermocouple. A pulse-echo ultrasonic test was carried out using a 2-MHz probe employing critically refracted longitudinal waves for measuring residual stresses across the weld joint. A digital height gauge was used to quantify the distortion caused during welding. There was a good agreement between the predicted and measured thermal cycles, residual stresses, and distortion. The concentrated heat intensity of A-TIG welding induced higher surface temperature in the weld center, produced a narrow weld bead, and exhibited a sharp temperature gradient at the weld/base metal interface. Peak residual stress and distortion of the A-TIG weld joint were found to be less than that of the TIG weld joint.

    Author Information:

    Ganesh, K. C.
    Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu

    Vasudevan, M.
    Advanced Welding Processes and Modelling Section, Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu

    Balasubramanian, K. R.
    Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu

    Vasantharaja, P.
    Advanced Welding Processes and Modelling Section, Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu

    Chandrasekhar, N.
    Advanced Welding Processes and Modelling Section, Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu

    Stock #: MPC20170143

    ISSN:2379-1365

    DOI: 10.1520/MPC20170143

    Author
    Title Thermo-Mechanical Analysis of Activated Tungsten Inert Gas Welding (A-TIG) of Type 316LN Stainless Steel Thin Plates
    Symposium ,
    Committee A01