Microstructure and mechanical properties of precipitation-hardened cast high-entropy superalloys

Lu Zhang; Xiaofeng Huo; Xi Jin; Bangsheng Li

doi:10.1080/02670836.2019.1710927

Microstructure and mechanical properties of precipitation-hardened cast high-entropy superalloys

Lu Zhang
, Xiaofeng Huo
, Xi Jin^*
, Bangsheng Li

^*Corresponding author for this work

School of Materials Science and Engineering

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

9 Scopus citations

Abstract

Recent studies indicated that precipitation-hardened high-entropy alloys (HEAs) possess outstanding properties. It is difficult to obtain substantial precipitated particles for HEAs at the as-cast condition. In this paper, cast precipitation-hardened high-entropy superalloys (HESAs) Ni_48−xCo₁₈Cr_10.5Fe_9.3Al_9.7Ti_4.5Mo_x (at.-%, x = 1, 2, 3) were designed and prepared. All HESAs possess a high-entropy matrix and a fine γ′ particles structure. HESAs have higher ultimate tensile strength and elongation at room temperature than conventional Ni-based superalloys and close yield strength. All HESAs possess high compressive strength at elevated temperature. At 850 °C, the strengths of all alloys are higher than 800 MPa. Solid solution strengthening and precipitation strengthening were discussed. Precipitation strengthening has the greatest contribution to yield strength.

Original language	English
Pages (from-to)	477-483
Number of pages	7
Journal	Materials Science and Technology (United Kingdom)
Volume	36
Issue number	4
DOIs	https://doi.org/10.1080/02670836.2019.1710927
State	Published - 3 Mar 2020

Keywords

High-entropy superalloy
mechanical property
microstructure
strengthening mechanism

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10.1080/02670836.2019.1710927

Cite this

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title = "Microstructure and mechanical properties of precipitation-hardened cast high-entropy superalloys",

abstract = "Recent studies indicated that precipitation-hardened high-entropy alloys (HEAs) possess outstanding properties. It is difficult to obtain substantial precipitated particles for HEAs at the as-cast condition. In this paper, cast precipitation-hardened high-entropy superalloys (HESAs) Ni48−xCo18Cr10.5Fe9.3Al9.7Ti4.5Mox (at.-\%, x = 1, 2, 3) were designed and prepared. All HESAs possess a high-entropy matrix and a fine γ′ particles structure. HESAs have higher ultimate tensile strength and elongation at room temperature than conventional Ni-based superalloys and close yield strength. All HESAs possess high compressive strength at elevated temperature. At 850 °C, the strengths of all alloys are higher than 800 MPa. Solid solution strengthening and precipitation strengthening were discussed. Precipitation strengthening has the greatest contribution to yield strength.",

keywords = "High-entropy superalloy, mechanical property, microstructure, strengthening mechanism",

author = "Lu Zhang and Xiaofeng Huo and Xi Jin and Bangsheng Li",

note = "Publisher Copyright: {\textcopyright} 2020, {\textcopyright} 2020 Institute of Materials, Minerals and Mining.",

year = "2020",

month = mar,

day = "3",

doi = "10.1080/02670836.2019.1710927",

language = "英语",

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journal = "Materials Science and Technology (United Kingdom)",

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TY - JOUR

T1 - Microstructure and mechanical properties of precipitation-hardened cast high-entropy superalloys

AU - Zhang, Lu

AU - Huo, Xiaofeng

AU - Jin, Xi

AU - Li, Bangsheng

PY - 2020/3/3

Y1 - 2020/3/3

N2 - Recent studies indicated that precipitation-hardened high-entropy alloys (HEAs) possess outstanding properties. It is difficult to obtain substantial precipitated particles for HEAs at the as-cast condition. In this paper, cast precipitation-hardened high-entropy superalloys (HESAs) Ni48−xCo18Cr10.5Fe9.3Al9.7Ti4.5Mox (at.-%, x = 1, 2, 3) were designed and prepared. All HESAs possess a high-entropy matrix and a fine γ′ particles structure. HESAs have higher ultimate tensile strength and elongation at room temperature than conventional Ni-based superalloys and close yield strength. All HESAs possess high compressive strength at elevated temperature. At 850 °C, the strengths of all alloys are higher than 800 MPa. Solid solution strengthening and precipitation strengthening were discussed. Precipitation strengthening has the greatest contribution to yield strength.

AB - Recent studies indicated that precipitation-hardened high-entropy alloys (HEAs) possess outstanding properties. It is difficult to obtain substantial precipitated particles for HEAs at the as-cast condition. In this paper, cast precipitation-hardened high-entropy superalloys (HESAs) Ni48−xCo18Cr10.5Fe9.3Al9.7Ti4.5Mox (at.-%, x = 1, 2, 3) were designed and prepared. All HESAs possess a high-entropy matrix and a fine γ′ particles structure. HESAs have higher ultimate tensile strength and elongation at room temperature than conventional Ni-based superalloys and close yield strength. All HESAs possess high compressive strength at elevated temperature. At 850 °C, the strengths of all alloys are higher than 800 MPa. Solid solution strengthening and precipitation strengthening were discussed. Precipitation strengthening has the greatest contribution to yield strength.

KW - High-entropy superalloy

KW - mechanical property

KW - microstructure

KW - strengthening mechanism

UR - https://www.scopus.com/pages/publications/85077840238

U2 - 10.1080/02670836.2019.1710927

DO - 10.1080/02670836.2019.1710927

M3 - 文章

AN - SCOPUS:85077840238

SN - 0267-0836

VL - 36

SP - 477

EP - 483

JO - Materials Science and Technology (United Kingdom)

JF - Materials Science and Technology (United Kingdom)

IS - 4

ER -

Microstructure and mechanical properties of precipitation-hardened cast high-entropy superalloys

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Keywords

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