Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service

Jingbo Yan; Yuefeng Gu; Fei Sun; Yaxin Xu; Yong Yuan; Jintao Lu; Zhen Yang; Yingying Dang

doi:10.1016/j.msea.2016.08.085

Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service

Jingbo Yan, Yuefeng Gu, Fei Sun, Yaxin Xu, Yong Yuan, Jintao Lu, Zhen Yang, Yingying Dang

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

24 Citations (Scopus)

Abstract

This work investigated the effect of long-term service on the evolution of microstructure and properties of HR3C alloy. Its results show that large amount of discontinuous chromium carbide is accompanied by a chromium depletion area that is formed along the grain boundary. This depletion area promotes the crack nucleation and propagation at the carbide-matrix interface at the grain boundary, leading to a decrease in the alloy ductility at room temperature. However, this deteriorative effect is not obvious at high temperatures primarily because the fast drop of the grain strength. Therefore, the crack propagates easily across the grain during the alloy deformation at high temperatures.

Original language	English
Pages (from-to)	289-298
Number of pages	10
Journal	Materials Science and Engineering A
Volume	675
DOIs	https://doi.org/10.1016/j.msea.2016.08.085
Publication status	Published - 2016 Oct 15
Externally published	Yes

Keywords

Aging
Alloy
Carbide
Grain Boundary

ASJC Scopus subject areas

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

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title = "Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service",

abstract = "This work investigated the effect of long-term service on the evolution of microstructure and properties of HR3C alloy. Its results show that large amount of discontinuous chromium carbide is accompanied by a chromium depletion area that is formed along the grain boundary. This depletion area promotes the crack nucleation and propagation at the carbide-matrix interface at the grain boundary, leading to a decrease in the alloy ductility at room temperature. However, this deteriorative effect is not obvious at high temperatures primarily because the fast drop of the grain strength. Therefore, the crack propagates easily across the grain during the alloy deformation at high temperatures.",

keywords = "Aging, Alloy, Carbide, Grain Boundary",

author = "Jingbo Yan and Yuefeng Gu and Fei Sun and Yaxin Xu and Yong Yuan and Jintao Lu and Zhen Yang and Yingying Dang",

note = "Funding Information: We appreciate the financial support by National Natural Science Foundation of China , China (NSFC Nos. 51301131 ). Publisher Copyright: {\textcopyright} 2016 Elsevier B.V. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.msea.2016.08.085",

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AU - Yan, Jingbo

AU - Gu, Yuefeng

AU - Sun, Fei

AU - Xu, Yaxin

AU - Yuan, Yong

AU - Lu, Jintao

AU - Yang, Zhen

AU - Dang, Yingying

N1 - Funding Information: We appreciate the financial support by National Natural Science Foundation of China , China (NSFC Nos. 51301131 ). Publisher Copyright: © 2016 Elsevier B.V. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2016/10/15

Y1 - 2016/10/15

N2 - This work investigated the effect of long-term service on the evolution of microstructure and properties of HR3C alloy. Its results show that large amount of discontinuous chromium carbide is accompanied by a chromium depletion area that is formed along the grain boundary. This depletion area promotes the crack nucleation and propagation at the carbide-matrix interface at the grain boundary, leading to a decrease in the alloy ductility at room temperature. However, this deteriorative effect is not obvious at high temperatures primarily because the fast drop of the grain strength. Therefore, the crack propagates easily across the grain during the alloy deformation at high temperatures.

AB - This work investigated the effect of long-term service on the evolution of microstructure and properties of HR3C alloy. Its results show that large amount of discontinuous chromium carbide is accompanied by a chromium depletion area that is formed along the grain boundary. This depletion area promotes the crack nucleation and propagation at the carbide-matrix interface at the grain boundary, leading to a decrease in the alloy ductility at room temperature. However, this deteriorative effect is not obvious at high temperatures primarily because the fast drop of the grain strength. Therefore, the crack propagates easily across the grain during the alloy deformation at high temperatures.

KW - Aging

KW - Alloy

KW - Carbide

KW - Grain Boundary

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JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -

Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service

Abstract

Keywords

ASJC Scopus subject areas

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