Dendritic coarsening of {gamma}' phase in a directionally solidified superalloy during 24,000 h of exposure at 1173 K

Journal Article · Sat May 15 00:00:00 EDT 2010 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2010.02.006· OSTI ID:22066207

Li, H ^[1]; Wang, L ^[1]

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1. Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 (China)

Dendritic coarsening of {gamma}' was investigated in a directionally solidified Ni-base superalloy during exposure at 1173 K for 24,000 h. Chemical homogeneity along different directions and residual internal strain in the experimental superalloy were measured by electronic probe microanalysis (EPMA) and electron back-scattered diffraction (EBSD) technique. It was indicated that the gradient of element distribution was anisotropic and the inner strain between dendrite core and interdendritic regions was different even after 24,000 h of exposure at 1173 K, which influenced the kinetics for the dendrite coarsening of {gamma}' phase.

• OSTI ID: 22066207
• Journal Information: Materials Characterization, Vol. 61, Issue 5; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BACKSCATTERING
DENDRITES
ELECTRON DIFFRACTION
ELECTRON MICROPROBE ANALYSIS
HEAT RESISTING ALLOYS
NICKEL BASE ALLOYS
PROBES
SEGREGATION
SOLIDIFICATION
SPATIAL DISTRIBUTION
STRAINS
TEMPERATURE DEPENDENCE