Elements segregation and phase precipitation behavior at grain boundary in a Ni-Cr-W based superalloy

Ruifeng Dong; Jinshan Li; Tiebang Zhang; Rui Hu; Hongchao Kou

doi:10.1016/j.matchar.2016.11.002

Elements segregation and phase precipitation behavior at grain boundary in a Ni-Cr-W based superalloy

Ruifeng Dong
, Jinshan Li
, Tiebang Zhang
, Rui Hu
, Hongchao Kou

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

41 Scopus citations

Abstract

In this work, grain boundary (GB) carbides and GB segregation are investigated on the basis of GB characteristics. The M₂₃C₆-type carbides are found to be the dominant GB carbides. GB M₂₃C₆ carbides prefer to precipitate at the general high-angle grain boundaries (HAGBs), while the Σ3 coherent twin boundaries with low interfacial energy are generally immune to precipitate M₂₃C₆. Correspondingly, a distinct segregation is observed at general HAGBs, and unobvious segregation is detected at Σ3 coherent twin boundaries. Combined with GB segregation and orientation relationship (OR) between GB M₂₃C₆ and γ matrix, the precipitation mechanism of GB M₂₃C₆ is proposed.

Original language	English
Pages (from-to)	189-196
Number of pages	8
Journal	Materials Characterization
Volume	122
DOIs	https://doi.org/10.1016/j.matchar.2016.11.002
State	Published - 1 Dec 2016

Keywords

Carbides precipitation
Element segregation
Grain boundary
Ni-based superalloy

Access to Document

10.1016/j.matchar.2016.11.002

Cite this

@article{7ef6230a62d740bf967024a46252617b,

title = "Elements segregation and phase precipitation behavior at grain boundary in a Ni-Cr-W based superalloy",

abstract = "In this work, grain boundary (GB) carbides and GB segregation are investigated on the basis of GB characteristics. The M23C6-type carbides are found to be the dominant GB carbides. GB M23C6 carbides prefer to precipitate at the general high-angle grain boundaries (HAGBs), while the Σ3 coherent twin boundaries with low interfacial energy are generally immune to precipitate M23C6. Correspondingly, a distinct segregation is observed at general HAGBs, and unobvious segregation is detected at Σ3 coherent twin boundaries. Combined with GB segregation and orientation relationship (OR) between GB M23C6 and γ matrix, the precipitation mechanism of GB M23C6 is proposed.",

keywords = "Carbides precipitation, Element segregation, Grain boundary, Ni-based superalloy",

author = "Ruifeng Dong and Jinshan Li and Tiebang Zhang and Rui Hu and Hongchao Kou",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Inc.",

year = "2016",

month = dec,

day = "1",

doi = "10.1016/j.matchar.2016.11.002",

language = "英语",

volume = "122",

pages = "189--196",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Elements segregation and phase precipitation behavior at grain boundary in a Ni-Cr-W based superalloy

AU - Dong, Ruifeng

AU - Li, Jinshan

AU - Zhang, Tiebang

AU - Hu, Rui

AU - Kou, Hongchao

PY - 2016/12/1

Y1 - 2016/12/1

N2 - In this work, grain boundary (GB) carbides and GB segregation are investigated on the basis of GB characteristics. The M23C6-type carbides are found to be the dominant GB carbides. GB M23C6 carbides prefer to precipitate at the general high-angle grain boundaries (HAGBs), while the Σ3 coherent twin boundaries with low interfacial energy are generally immune to precipitate M23C6. Correspondingly, a distinct segregation is observed at general HAGBs, and unobvious segregation is detected at Σ3 coherent twin boundaries. Combined with GB segregation and orientation relationship (OR) between GB M23C6 and γ matrix, the precipitation mechanism of GB M23C6 is proposed.

AB - In this work, grain boundary (GB) carbides and GB segregation are investigated on the basis of GB characteristics. The M23C6-type carbides are found to be the dominant GB carbides. GB M23C6 carbides prefer to precipitate at the general high-angle grain boundaries (HAGBs), while the Σ3 coherent twin boundaries with low interfacial energy are generally immune to precipitate M23C6. Correspondingly, a distinct segregation is observed at general HAGBs, and unobvious segregation is detected at Σ3 coherent twin boundaries. Combined with GB segregation and orientation relationship (OR) between GB M23C6 and γ matrix, the precipitation mechanism of GB M23C6 is proposed.

KW - Carbides precipitation

KW - Element segregation

KW - Grain boundary

KW - Ni-based superalloy

UR - https://www.scopus.com/pages/publications/84994752031

U2 - 10.1016/j.matchar.2016.11.002

DO - 10.1016/j.matchar.2016.11.002

M3 - 文章

AN - SCOPUS:84994752031

SN - 1044-5803

VL - 122

SP - 189

EP - 196

JO - Materials Characterization

JF - Materials Characterization

ER -

Elements segregation and phase precipitation behavior at grain boundary in a Ni-Cr-W based superalloy

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this