Effects of rare earth yttrium on microstructure and properties of Ni–16Mo–7Cr–4Fe nickel-based superalloy
Abstract
Effects of rare earth yttrium on microstructure of Ni–16Mo–7Cr–4Fe alloy were examined by optical microscopy, scanning electron microscopy, transmission electron microscopy and X-ray fluorescence. M{sub 6}C phase was observed in the alloys with and without yttrium addition, and Ni{sub 17}Y{sub 2} phase existed in the alloys containing 0.05–0.43 wt.% yttrium simultaneously. The amount of Ni{sub 17}Y{sub 2} phase increased as yttrium concentration increased. When the concentration of yttrium increased to 0.43 wt.%, some multi-precipitated phase regions appeared in the form of large amount of coarse Ni{sub 3}Y phase surrounded by M{sub 6}C phase and γ phase in the alloy. Influences of rare earth yttrium on high temperature static oxidation and mechanical properties of Ni–16Mo–7Cr–4Fe alloy were also investigated. The alloy containing 0.05 wt.% yttrium showed the best oxidation resistance and mechanical properties simultaneously. The adequate concentration of yttrium at grain boundary and in the solid-solution (γ phase) and the adhesion enhancement of the outer oxidation scale to the substrate are key factors for the improvements in the mechanical properties and oxidation resistance respectively. - Highlights: • When the content of yttrium reaches to 0.43%, some multiphase regions appear. • When the content of yttrium reaches to 0.43%, some Ni{sub 17}Y{submore »
- Authors:
-
- Shanghai Institute of Applied Physics, China Academy of Sciences, 2019 Jialuo Road, Shanghai 201800 (China)
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai 201204 (China)
- Publication Date:
- OSTI Identifier:
- 22403546
- Resource Type:
- Journal Article
- Journal Name:
- Materials Characterization
- Additional Journal Information:
- Journal Volume: 95; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CHROMIUM ALLOYS; CONCENTRATION RATIO; GRAIN BOUNDARIES; IRON ALLOYS; MECHANICAL PROPERTIES; MOLYBDENUM BASE ALLOYS; MORPHOLOGY; NICKEL; NICKEL ALLOYS; OPTICAL MICROSCOPY; OXIDATION; RARE EARTHS; SCANNING ELECTRON MICROSCOPY; SOLID SOLUTIONS; SUBSTRATES; TRANSMISSION ELECTRON MICROSCOPY; YTTRIUM; YTTRIUM ADDITIONS
Citation Formats
Li, X. L., He, S.M., E-mail: heshangming@sinap.ac.cn, Zhou, X. T., Zou, Y., Li, Z. J., Li, A. G., and Yu, X. H. Effects of rare earth yttrium on microstructure and properties of Ni–16Mo–7Cr–4Fe nickel-based superalloy. United States: N. p., 2014.
Web. doi:10.1016/J.MATCHAR.2014.06.016.
Li, X. L., He, S.M., E-mail: heshangming@sinap.ac.cn, Zhou, X. T., Zou, Y., Li, Z. J., Li, A. G., & Yu, X. H. Effects of rare earth yttrium on microstructure and properties of Ni–16Mo–7Cr–4Fe nickel-based superalloy. United States. https://doi.org/10.1016/J.MATCHAR.2014.06.016
Li, X. L., He, S.M., E-mail: heshangming@sinap.ac.cn, Zhou, X. T., Zou, Y., Li, Z. J., Li, A. G., and Yu, X. H. Mon .
"Effects of rare earth yttrium on microstructure and properties of Ni–16Mo–7Cr–4Fe nickel-based superalloy". United States. https://doi.org/10.1016/J.MATCHAR.2014.06.016.
@article{osti_22403546,
title = {Effects of rare earth yttrium on microstructure and properties of Ni–16Mo–7Cr–4Fe nickel-based superalloy},
author = {Li, X. L. and He, S.M., E-mail: heshangming@sinap.ac.cn and Zhou, X. T. and Zou, Y. and Li, Z. J. and Li, A. G. and Yu, X. H.},
abstractNote = {Effects of rare earth yttrium on microstructure of Ni–16Mo–7Cr–4Fe alloy were examined by optical microscopy, scanning electron microscopy, transmission electron microscopy and X-ray fluorescence. M{sub 6}C phase was observed in the alloys with and without yttrium addition, and Ni{sub 17}Y{sub 2} phase existed in the alloys containing 0.05–0.43 wt.% yttrium simultaneously. The amount of Ni{sub 17}Y{sub 2} phase increased as yttrium concentration increased. When the concentration of yttrium increased to 0.43 wt.%, some multi-precipitated phase regions appeared in the form of large amount of coarse Ni{sub 3}Y phase surrounded by M{sub 6}C phase and γ phase in the alloy. Influences of rare earth yttrium on high temperature static oxidation and mechanical properties of Ni–16Mo–7Cr–4Fe alloy were also investigated. The alloy containing 0.05 wt.% yttrium showed the best oxidation resistance and mechanical properties simultaneously. The adequate concentration of yttrium at grain boundary and in the solid-solution (γ phase) and the adhesion enhancement of the outer oxidation scale to the substrate are key factors for the improvements in the mechanical properties and oxidation resistance respectively. - Highlights: • When the content of yttrium reaches to 0.43%, some multiphase regions appear. • When the content of yttrium reaches to 0.43%, some Ni{sub 17}Y{sub 2} chains appear. • The morphology of M{sub 6}C changes with increasing concentration of yttrium. • The Ni–16Mo–7Cr–4Fe alloy with 0.05% yttrium performs the best mechanical property. • The Ni–16Mo–7Cr–4Fe alloy with 0.05% yttrium performs the best oxidation resistance.},
doi = {10.1016/J.MATCHAR.2014.06.016},
url = {https://www.osti.gov/biblio/22403546},
journal = {Materials Characterization},
issn = {1044-5803},
number = ,
volume = 95,
place = {United States},
year = {2014},
month = {9}
}
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