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

21 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

Access to Document

10.1016/j.msea.2016.08.085

Fingerprint Dive into the research topics of 'Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service'. Together they form a unique fingerprint.

Cite this

Yan, J., Gu, Y., Sun, F., Xu, Y., Yuan, Y., Lu, J., Yang, Z., & Dang, Y. (2016). Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service. Materials Science and Engineering A, 675, 289-298. https://doi.org/10.1016/j.msea.2016.08.085

@article{5391e65220554ec792d144b904dfae4b,

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",

year = "2016",

month = oct,

day = "15",

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

language = "English",

volume = "675",

pages = "289--298",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

issn = "0921-5093",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Evolution of microstructure and mechanical properties of a 25Cr-20Ni heat resistant alloy after long-term service

AU - Yan, Jingbo

AU - Gu, Yuefeng

AU - Sun, Fei

AU - Xu, Yaxin

AU - Yuan, Yong

AU - Lu, Jintao

AU - Yang, Zhen

AU - Dang, Yingying

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

UR - http://www.scopus.com/inward/record.url?scp=84983680200&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84983680200&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2016.08.085

DO - 10.1016/j.msea.2016.08.085

M3 - Article

AN - SCOPUS:84983680200

VL - 675

SP - 289

EP - 298

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 -