Solidification cracking of a nickel alloy during high-power keyhole mode laser welding

Nickel alloy Inconel 740H, a candidate material for use in ultra-supercritical power plants, is susceptible to solidification cracking during high power deep penetration laser welding. Here we examine how cracking is affected by welding variables and determine the locations where the cracks occur experimentally and theoretically. We use a solidification cracking model to calculate the effects of welding variables on cracking and the locations where the cracks form during high power laser keyhole mode welding of IN 740H. The parameters needed for the cracking model are obtained from a well-tested numerical heat transfer and fluid flow model for keyhole-mode welding. Model predictions of cracking and their locations for different welding conditions are verified by experiments.

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Work Title Solidification cracking of a nickel alloy during high-power keyhole mode laser welding
Access
Open Access
Creators
  1. B. Mondal
  2. M. Gao
  3. T. A. Palmer
  4. T. DebRoy
Keyword
  1. Laser welding
  2. Keyhole mode welding
  3. Solidification cracking
  4. Nickel alloy
  5. Modeling hot cracking
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Journal of Materials Processing Technology
Publication Date April 13, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.jmatprotec.2022.117576
Deposited July 27, 2022

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Version 1
published

  • Created
  • Added Solidification_cracking_of_a_nickel_alloy_during_high-power_keyhole_mode_laser_welding.docx
  • Added Creator B. Mondal
  • Added Creator M. Gao
  • Added Creator T. A. Palmer
  • Added Creator T. DebRoy
  • Published
  • Updated Keyword, Publication Date Show Changes
    Keyword
    • Laser welding, Keyhole mode welding, Solidification cracking, Nickel alloy, Modeling hot cracking
    Publication Date
    • 2022-07-01
    • 2022-04-13