Comparative Studies on Metallurgical and Mechanical Properties of Bimetallic Combination on Incoloy 800 and SS 316L Fabricated by Gas Metal and Shield Metal Arc Welding

  • M. Manikandan
  • R. Gunachandran
  • M. Vigneshwaran
  • S. Sudhakar
  • A. Srikanth
  • M. Venkateshkannan
  • M. Arivarasu
  • N. Arivazhagan
  • Deva N. Rajan
Technical Paper
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Abstract

The needs of the dissimilar weld joint between superalloy and stainless steel is increasing in many industries. Gas tungsten arc welding (GTAW) and shield metal arc welding (SMAW) are the most common methods used to fabricate the weld joints in the fabrication industry due to its high versatility in the fabrication of industrial components and parts. The present study investigated the metallurgical and mechanical properties of bimetallic joints fabricated between nickel-based superalloy Incoloy 800 and stainless steel AISI 316L. The weld joints were fabricated by using ERNiCrMo-3 filler wire. The micrograph of weld fusion zone revealed the austenitic microstructure with columnar dendrite and cellular structure in both weldments. SEM/EDS analysis witnessed the precipitation of Nb-rich phase in the weld fusion zone fabricated by SMAW process, and it was minimized in case of GTA welding technique. The strength and toughness of the weld joint fabricated by GTAW improved 14 and 25% respectively when compared to SMAW technique.

Keywords

Dissimilar welding Shield metal arc welding Gas Metal arc welding Incoloy 800 AISI 316L 

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Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  • M. Manikandan
    • 1
  • R. Gunachandran
    • 1
  • M. Vigneshwaran
    • 1
  • S. Sudhakar
    • 1
  • A. Srikanth
    • 1
  • M. Venkateshkannan
    • 1
  • M. Arivarasu
    • 1
  • N. Arivazhagan
    • 1
  • Deva N. Rajan
    • 2
  1. 1.School of Mechanical EngineeringVIT UniversityVelloreIndia
  2. 2.Department of Mechanical EngineeringPanimalar Engineering CollegeChennaiIndia

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