Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy

Kyoko Kawagishi; Chihiro Tabata; Takuya Sugiyama; Tadaharu Yokokawa; Jun Uzuhashi; Tadakatsu Ohkubo; Yuji Takata; Michinari Yuyama; Shinsuke Suzuki; Hiroshi Harada

doi:10.1007/978-3-030-51834-9_78

Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy

Kyoko Kawagishi^*, Chihiro Tabata, Takuya Sugiyama, Tadaharu Yokokawa, Jun Uzuhashi, Tadakatsu Ohkubo, Yuji Takata, Michinari Yuyama, Shinsuke Suzuki, Hiroshi Harada

^*Corresponding author for this work

School of Fundamental Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

It is known that a single-crystal Ni-base superalloy containing a trace amount of sulfur has reduced high-temperature oxidation resistance. Our previous study has shown that melting of Ni-base superalloys in a CaO crucible can eliminate the effect of sulfur on oxidation resistance, but the mechanism was not completely clear. In this study, we finally succeeded in detecting the segregation of sulfur at the oxide/substrate interface of 6th generation single-crystal superalloys using STEM-EDS analysis and confirmed that segregation could be suppressed by melting in the CaO crucible. As a result, it was found that melting in the CaO crucible can improve the oxidation resistance while maintaining the creep characteristics of sixth-generation single-crystal Ni-base superalloy.

Original language	English
Title of host publication	Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys
Editors	Sammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	798-803
Number of pages	6
ISBN (Print)	9783030518332
DOIs	https://doi.org/10.1007/978-3-030-51834-9_78
Publication status	Published - 2020
Event	14th International Symposium on Superalloys, Superalloys 2021 - Seven Springs, United States Duration: 2021 Sep 12 → 2021 Sep 16

Publication series

Name	Minerals, Metals and Materials Series
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	14th International Symposium on Superalloys, Superalloys 2021
Country/Territory	United States
City	Seven Springs
Period	21/9/12 → 21/9/16

Keywords

Creep
Oxidation
Segregation
Single-crystal Ni-based superalloy
Sulfur

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy Engineering and Power Technology
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/978-3-030-51834-9_78

Cite this

Kawagishi, K., Tabata, C., Sugiyama, T., Yokokawa, T., Uzuhashi, J., Ohkubo, T., Takata, Y., Yuyama, M., Suzuki, S., & Harada, H. (2020). Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy. In S. Tin, M. Hardy, J. Clews, J. Cormier, Q. Feng, J. Marcin, C. O'Brien, & A. Suzuki (Eds.), Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys (pp. 798-803). (Minerals, Metals and Materials Series). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-030-51834-9_78

Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy. / Kawagishi, Kyoko; Tabata, Chihiro; Sugiyama, Takuya et al.

Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. ed. / Sammy Tin; Mark Hardy; Justin Clews; Jonathan Cormier; Qiang Feng; John Marcin; Chris O'Brien; Akane Suzuki. Springer Science and Business Media Deutschland GmbH, 2020. p. 798-803 (Minerals, Metals and Materials Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kawagishi, K, Tabata, C, Sugiyama, T, Yokokawa, T, Uzuhashi, J, Ohkubo, T, Takata, Y, Yuyama, M, Suzuki, S & Harada, H 2020, Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy. in S Tin, M Hardy, J Clews, J Cormier, Q Feng, J Marcin, C O'Brien & A Suzuki (eds), Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. Minerals, Metals and Materials Series, Springer Science and Business Media Deutschland GmbH, pp. 798-803, 14th International Symposium on Superalloys, Superalloys 2021, Seven Springs, United States, 21/9/12. https://doi.org/10.1007/978-3-030-51834-9_78

Kawagishi K, Tabata C, Sugiyama T, Yokokawa T, Uzuhashi J, Ohkubo T et al. Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy. In Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A, editors, Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. Springer Science and Business Media Deutschland GmbH. 2020. p. 798-803. (Minerals, Metals and Materials Series). https://doi.org/10.1007/978-3-030-51834-9_78

Kawagishi, Kyoko ; Tabata, Chihiro ; Sugiyama, Takuya et al. / Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy. Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. editor / Sammy Tin ; Mark Hardy ; Justin Clews ; Jonathan Cormier ; Qiang Feng ; John Marcin ; Chris O'Brien ; Akane Suzuki. Springer Science and Business Media Deutschland GmbH, 2020. pp. 798-803 (Minerals, Metals and Materials Series).

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abstract = "It is known that a single-crystal Ni-base superalloy containing a trace amount of sulfur has reduced high-temperature oxidation resistance. Our previous study has shown that melting of Ni-base superalloys in a CaO crucible can eliminate the effect of sulfur on oxidation resistance, but the mechanism was not completely clear. In this study, we finally succeeded in detecting the segregation of sulfur at the oxide/substrate interface of 6th generation single-crystal superalloys using STEM-EDS analysis and confirmed that segregation could be suppressed by melting in the CaO crucible. As a result, it was found that melting in the CaO crucible can improve the oxidation resistance while maintaining the creep characteristics of sixth-generation single-crystal Ni-base superalloy.",

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note = "Funding Information: Acknowledgements This research was financially supported by Japan Science and Technology Agency (JST), under the Advanced Low Carbon Technology Research and Development Program (ALCA) “Development of direct and complete recycling method for superalloy turbine aerofoils (JPMJAL1302).” Publisher Copyright: {\textcopyright} 2020, The Minerals, Metals & Materials Society.; 14th International Symposium on Superalloys, Superalloys 2021 ; Conference date: 12-09-2021 Through 16-09-2021",

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AU - Suzuki, Shinsuke

AU - Harada, Hiroshi

N1 - Funding Information: Acknowledgements This research was financially supported by Japan Science and Technology Agency (JST), under the Advanced Low Carbon Technology Research and Development Program (ALCA) “Development of direct and complete recycling method for superalloy turbine aerofoils (JPMJAL1302).” Publisher Copyright: © 2020, The Minerals, Metals & Materials Society.

PY - 2020

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N2 - It is known that a single-crystal Ni-base superalloy containing a trace amount of sulfur has reduced high-temperature oxidation resistance. Our previous study has shown that melting of Ni-base superalloys in a CaO crucible can eliminate the effect of sulfur on oxidation resistance, but the mechanism was not completely clear. In this study, we finally succeeded in detecting the segregation of sulfur at the oxide/substrate interface of 6th generation single-crystal superalloys using STEM-EDS analysis and confirmed that segregation could be suppressed by melting in the CaO crucible. As a result, it was found that melting in the CaO crucible can improve the oxidation resistance while maintaining the creep characteristics of sixth-generation single-crystal Ni-base superalloy.

AB - It is known that a single-crystal Ni-base superalloy containing a trace amount of sulfur has reduced high-temperature oxidation resistance. Our previous study has shown that melting of Ni-base superalloys in a CaO crucible can eliminate the effect of sulfur on oxidation resistance, but the mechanism was not completely clear. In this study, we finally succeeded in detecting the segregation of sulfur at the oxide/substrate interface of 6th generation single-crystal superalloys using STEM-EDS analysis and confirmed that segregation could be suppressed by melting in the CaO crucible. As a result, it was found that melting in the CaO crucible can improve the oxidation resistance while maintaining the creep characteristics of sixth-generation single-crystal Ni-base superalloy.

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Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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