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Fusion zone microstructure of laser beam welded directionally solidified Ni3Al-base alloy IC6

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
54
Issue
5
Identifiers
DOI: 10.1016/j.scriptamat.2005.11.010
Keywords
  • Alloy Ic6
  • Welding
  • Hot Cracking

Abstract

Abstract The fusion zone microstructure of laser welded alloy IC6 was examined. Extensive weld-metal cracking was observed to be closely associated with non-equilibrium eutectic-type microconstituents identified as consisting of γ, γ′ and NiMo (Y) phases. Their formation has been related to modification of primary solidification path due to reduced solutal microsegregation.

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