Secondary M23C6 precipitation behavior in Ni-Cr-W based superalloy

Guanghai Bai; Rui Hu; Jinshan Li; Hong Zhong; Hongchao Kou; Hengzhi Fu

Secondary M₂₃C₆ precipitation behavior in Ni-Cr-W based superalloy

Guanghai Bai, Rui Hu, Jinshan Li, Hong Zhong, Hongchao Kou, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

21 Scopus citations

Abstract

The precipitation behavior of the secondary M₂₃C₆ carbide in Ni-Cr-W based superalloy was studied by DSC, SEM and TEM systematically. The results show that secondary M₂₃C₆ carbide precipitates from 648 to 1147°C and it dissolves into the matrix when the temperature is above 1160°C. The primary M₆C carbide decomposes at 1349°C and the alloy melts completely at 1400°C. There are two morphologies of M₂₃C₆ precipitate at the grain boundaries. Coarse lamella M₂₃C₆ precipitates from 655 to 900°C and it changes to discrete particles above 900°C. The cooling rate has an important effect on M₂₃C₆precipitation behavior. In addition, during the cooling process, the serrated grain boundaries are formed because of the discrete M₂₃C₆carbide particles which precipitate at grain boundaries. Copyright

Original language	English
Pages (from-to)	1737-1741
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	40
Issue number	10
State	Published - Oct 2011

Keywords

DSC
MC
Ni-Cr-W based superalloy
Precipitate
Serrated grain boundary

Cite this

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title = "Secondary M23C6 precipitation behavior in Ni-Cr-W based superalloy",

abstract = "The precipitation behavior of the secondary M23C6 carbide in Ni-Cr-W based superalloy was studied by DSC, SEM and TEM systematically. The results show that secondary M23C6 carbide precipitates from 648 to 1147°C and it dissolves into the matrix when the temperature is above 1160°C. The primary M6C carbide decomposes at 1349°C and the alloy melts completely at 1400°C. There are two morphologies of M23C6 precipitate at the grain boundaries. Coarse lamella M23C6 precipitates from 655 to 900°C and it changes to discrete particles above 900°C. The cooling rate has an important effect on M23C6precipitation behavior. In addition, during the cooling process, the serrated grain boundaries are formed because of the discrete M23C6carbide particles which precipitate at grain boundaries. Copyright",

keywords = "DSC, MC, Ni-Cr-W based superalloy, Precipitate, Serrated grain boundary",

author = "Guanghai Bai and Rui Hu and Jinshan Li and Hong Zhong and Hongchao Kou and Hengzhi Fu",

year = "2011",

month = oct,

language = "英语",

volume = "40",

pages = "1737--1741",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

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TY - JOUR

T1 - Secondary M23C6 precipitation behavior in Ni-Cr-W based superalloy

AU - Bai, Guanghai

AU - Hu, Rui

AU - Li, Jinshan

AU - Zhong, Hong

AU - Kou, Hongchao

AU - Fu, Hengzhi

PY - 2011/10

Y1 - 2011/10

N2 - The precipitation behavior of the secondary M23C6 carbide in Ni-Cr-W based superalloy was studied by DSC, SEM and TEM systematically. The results show that secondary M23C6 carbide precipitates from 648 to 1147°C and it dissolves into the matrix when the temperature is above 1160°C. The primary M6C carbide decomposes at 1349°C and the alloy melts completely at 1400°C. There are two morphologies of M23C6 precipitate at the grain boundaries. Coarse lamella M23C6 precipitates from 655 to 900°C and it changes to discrete particles above 900°C. The cooling rate has an important effect on M23C6precipitation behavior. In addition, during the cooling process, the serrated grain boundaries are formed because of the discrete M23C6carbide particles which precipitate at grain boundaries. Copyright

AB - The precipitation behavior of the secondary M23C6 carbide in Ni-Cr-W based superalloy was studied by DSC, SEM and TEM systematically. The results show that secondary M23C6 carbide precipitates from 648 to 1147°C and it dissolves into the matrix when the temperature is above 1160°C. The primary M6C carbide decomposes at 1349°C and the alloy melts completely at 1400°C. There are two morphologies of M23C6 precipitate at the grain boundaries. Coarse lamella M23C6 precipitates from 655 to 900°C and it changes to discrete particles above 900°C. The cooling rate has an important effect on M23C6precipitation behavior. In addition, during the cooling process, the serrated grain boundaries are formed because of the discrete M23C6carbide particles which precipitate at grain boundaries. Copyright

KW - DSC

KW - MC

KW - Ni-Cr-W based superalloy

KW - Precipitate

KW - Serrated grain boundary

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M3 - 文章

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SN - 1002-185X

VL - 40

SP - 1737

EP - 1741

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 10

ER -

Secondary M₂₃C₆ precipitation behavior in Ni-Cr-W based superalloy

Abstract

Keywords

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