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Microstructural study of weld fusion zone of TIG welded IN 738LC nickel-based superalloy

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
51
Issue
7
Identifiers
DOI: 10.1016/j.scriptamat.2004.06.013
Keywords
  • Nickel Alloys
  • Welding
  • Solidification
  • Microstructure

Abstract

Abstract The weld fusion zone microstructure of a commercial aerospace superalloy IN 738 was examined. Elemental segregation induced interdendritic microconstituents were identified to include terminal solidification product M 3B 2 and Ni 7Zr 2 in association with γ–γ′ eutectic constituent, which require proper consideration during the development of optimum post weld heat treatment.

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