☆ 4.7 Article

Boundary liquation and interface cracking characterization in laser deposition of Inconel 738 on directionally solidified Ni-based superalloy

SCRIPTA MATERIALIA (2005)

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Journal

SCRIPTA MATERIALIA
Volume 53, Issue 2, Pages 159-164

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2005.03.047

Keywords

nickel alloys; laser deposition; liquation cracking; superalloys; directional solidification

Categories

Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

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Laser deposition of Inconel 738 on directionally solidified (DS) Ni-based superalloy demonstrates a strong susceptibility to cracking. Cracks originate from the liquation of low melting point eutectic on the DS grain boundary. Five boundary liquation and interface cracking styles were identified. Sound Inconel 738 deposition layers were achieved free of cracks. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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