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

B. Mondal, M. Gao, T. A. Palmer, T. DebRoy

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number117576
JournalJournal of Materials Processing Technology
Volume305
DOIs
StatePublished - Jul 2022

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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