Integrated modeling of cracking during deep penetration laser welding of nickel alloys

M. Z. Gao, B. Mondal, T. A. Palmer, W. Zhang, T. DebRoy

Research output: Contribution to journalArticlepeer-review

Abstract

During deep penetration laser welding of nickel alloys, interactions between composition and processing conditions can lead to the formation of defects. Inconel 740H, for example, has demonstrated a susceptibility to horizontal fusion zone cracking at locations between 70% and 80% of the weld depth during laser welding at powers above 5 kW. Coupling three-dimensional heat transfer, fluid flow, and stress modeling tools allowed that both the strain rate and stress normal to the solidification direction to be calculated. In the Inconel 740H welds, cracks formed at locations where the strain rate and stress simultaneously reached critical levels. No cracking was observed in the Inconel 690 welds, since the strain rate and stress did not simultaneously reach these critical levels.

Original languageEnglish (US)
Pages (from-to)689-700
Number of pages12
JournalScience and Technology of Welding and Joining
Volume28
Issue number8
DOIs
StatePublished - 2023

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics

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