Designing high entropy superalloys for elevated temperature application

Yung Ta Chen; Yao Jen Chang; Hideyuki Murakami; Stéphane Gorsse; An Chou Yeh

doi:10.1016/j.scriptamat.2020.06.002

Designing high entropy superalloys for elevated temperature application

Yung Ta Chen, Yao Jen Chang, Hideyuki Murakami, Stéphane Gorsse, An Chou Yeh^*

^*Corresponding author for this work

Graduate School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

In the context of cast alloy development for high temperature applications, high entropy superalloys (HESA) have exhibited superior cost specific tensile strength than that of superalloys such as CM247LC. Compositions of HESA are distinctively different from those of cast superalloys with higher contents of Fe and Ti, making HESA cheaper and lighter. Comparing to superalloys, although HESA has adopted the template of FCC-structured (γ) matrix and coherent L1₂-structured (γ′) precipitates, γ′ is enriched with solutes with higher intrinsic strength, rendering positive lattice misfit, and the high entropy γ matrix may have attributed to a good combination of strength and ductility.

Original language	English
Pages (from-to)	177-182
Number of pages	6
Journal	Scripta Materialia
Volume	187
DOIs	https://doi.org/10.1016/j.scriptamat.2020.06.002
Publication status	Published - 2020 Oct

Keywords

Cost performance
High entropy superalloys
High temperature properties
Superalloys

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2020.06.002

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title = "Designing high entropy superalloys for elevated temperature application",

abstract = "In the context of cast alloy development for high temperature applications, high entropy superalloys (HESA) have exhibited superior cost specific tensile strength than that of superalloys such as CM247LC. Compositions of HESA are distinctively different from those of cast superalloys with higher contents of Fe and Ti, making HESA cheaper and lighter. Comparing to superalloys, although HESA has adopted the template of FCC-structured (γ) matrix and coherent L12-structured (γ′) precipitates, γ′ is enriched with solutes with higher intrinsic strength, rendering positive lattice misfit, and the high entropy γ matrix may have attributed to a good combination of strength and ductility.",

keywords = "Cost performance, High entropy superalloys, High temperature properties, Superalloys",

author = "Chen, {Yung Ta} and Chang, {Yao Jen} and Hideyuki Murakami and St{\'e}phane Gorsse and Yeh, {An Chou}",

note = "Funding Information: Authors would like to acknowledge funding supports from Ministry of Science and Technology (MOST) in Taiwan under Grant MOST108-2218-E-007-005 , MOST109-2634-F-007-024 , and MOST109-2811-E-007-500 ; the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education. Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = oct,

doi = "10.1016/j.scriptamat.2020.06.002",

language = "English",

volume = "187",

pages = "177--182",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Limited",

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T1 - Designing high entropy superalloys for elevated temperature application

AU - Chen, Yung Ta

AU - Chang, Yao Jen

AU - Murakami, Hideyuki

AU - Gorsse, Stéphane

AU - Yeh, An Chou

N1 - Funding Information: Authors would like to acknowledge funding supports from Ministry of Science and Technology (MOST) in Taiwan under Grant MOST108-2218-E-007-005 , MOST109-2634-F-007-024 , and MOST109-2811-E-007-500 ; the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education. Publisher Copyright: © 2020

PY - 2020/10

Y1 - 2020/10

N2 - In the context of cast alloy development for high temperature applications, high entropy superalloys (HESA) have exhibited superior cost specific tensile strength than that of superalloys such as CM247LC. Compositions of HESA are distinctively different from those of cast superalloys with higher contents of Fe and Ti, making HESA cheaper and lighter. Comparing to superalloys, although HESA has adopted the template of FCC-structured (γ) matrix and coherent L12-structured (γ′) precipitates, γ′ is enriched with solutes with higher intrinsic strength, rendering positive lattice misfit, and the high entropy γ matrix may have attributed to a good combination of strength and ductility.

AB - In the context of cast alloy development for high temperature applications, high entropy superalloys (HESA) have exhibited superior cost specific tensile strength than that of superalloys such as CM247LC. Compositions of HESA are distinctively different from those of cast superalloys with higher contents of Fe and Ti, making HESA cheaper and lighter. Comparing to superalloys, although HESA has adopted the template of FCC-structured (γ) matrix and coherent L12-structured (γ′) precipitates, γ′ is enriched with solutes with higher intrinsic strength, rendering positive lattice misfit, and the high entropy γ matrix may have attributed to a good combination of strength and ductility.

KW - Cost performance

KW - High entropy superalloys

KW - High temperature properties

KW - Superalloys

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DO - 10.1016/j.scriptamat.2020.06.002

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VL - 187

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EP - 182

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Designing high entropy superalloys for elevated temperature application

Abstract

Keywords

ASJC Scopus subject areas

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