As-forged microstructure and tensile properties of Ni-20Cr-18W superalloy

Yinben Han; Xiangyi Xue; Tiebang Zhang; Rui Hu; Hongchao Kou; Jinshan Li

As-forged microstructure and tensile properties of Ni-20Cr-18W superalloy

Yinben Han
, Xiangyi Xue
, Tiebang Zhang
, Rui Hu
, Hongchao Kou
, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

1 Scopus citations

Abstract

The room temperature tensile behavior of solution strengthened Ni-20Cr-18W wrought superalloy was investigated by a tensile testing machine. Its microstructure evolution and fractures were studied by OM and SEM. Besides, XRD was used to identify carbide type. The results indicate that as-cast structure is typical dendrite. As-forged structure is a number of fine equiaxed crystal grains whose average size is 60~70 μm (ASTM 5). M₆C-type carbides randomly disperse on the grain boundary and they can improve the strength of the superalloy due to pining. Lots of M₆C-type carbides are further broken in tensile deformation process, causing the deterioration of external load distribution and a lower the ductility of the superalloy. The room temperature fractographs of samples show a typical dimple-ductile fracture.

Original language	English
Pages (from-to)	2314-2317
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	44
Issue number	9
State	Published - 1 Sep 2015

Keywords

Manufacturing processes
Microstructure
Ni-20Cr-18W base superalloy
Tensile properties
Wrought

Cite this

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title = "As-forged microstructure and tensile properties of Ni-20Cr-18W superalloy",

abstract = "The room temperature tensile behavior of solution strengthened Ni-20Cr-18W wrought superalloy was investigated by a tensile testing machine. Its microstructure evolution and fractures were studied by OM and SEM. Besides, XRD was used to identify carbide type. The results indicate that as-cast structure is typical dendrite. As-forged structure is a number of fine equiaxed crystal grains whose average size is 60\textasciitilde{}70 μm (ASTM 5). M6C-type carbides randomly disperse on the grain boundary and they can improve the strength of the superalloy due to pining. Lots of M6C-type carbides are further broken in tensile deformation process, causing the deterioration of external load distribution and a lower the ductility of the superalloy. The room temperature fractographs of samples show a typical dimple-ductile fracture.",

keywords = "Manufacturing processes, Microstructure, Ni-20Cr-18W base superalloy, Tensile properties, Wrought",

author = "Yinben Han and Xiangyi Xue and Tiebang Zhang and Rui Hu and Hongchao Kou and Jinshan Li",

year = "2015",

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TY - JOUR

T1 - As-forged microstructure and tensile properties of Ni-20Cr-18W superalloy

AU - Han, Yinben

AU - Xue, Xiangyi

AU - Zhang, Tiebang

AU - Hu, Rui

AU - Kou, Hongchao

AU - Li, Jinshan

PY - 2015/9/1

Y1 - 2015/9/1

N2 - The room temperature tensile behavior of solution strengthened Ni-20Cr-18W wrought superalloy was investigated by a tensile testing machine. Its microstructure evolution and fractures were studied by OM and SEM. Besides, XRD was used to identify carbide type. The results indicate that as-cast structure is typical dendrite. As-forged structure is a number of fine equiaxed crystal grains whose average size is 60~70 μm (ASTM 5). M6C-type carbides randomly disperse on the grain boundary and they can improve the strength of the superalloy due to pining. Lots of M6C-type carbides are further broken in tensile deformation process, causing the deterioration of external load distribution and a lower the ductility of the superalloy. The room temperature fractographs of samples show a typical dimple-ductile fracture.

AB - The room temperature tensile behavior of solution strengthened Ni-20Cr-18W wrought superalloy was investigated by a tensile testing machine. Its microstructure evolution and fractures were studied by OM and SEM. Besides, XRD was used to identify carbide type. The results indicate that as-cast structure is typical dendrite. As-forged structure is a number of fine equiaxed crystal grains whose average size is 60~70 μm (ASTM 5). M6C-type carbides randomly disperse on the grain boundary and they can improve the strength of the superalloy due to pining. Lots of M6C-type carbides are further broken in tensile deformation process, causing the deterioration of external load distribution and a lower the ductility of the superalloy. The room temperature fractographs of samples show a typical dimple-ductile fracture.

KW - Manufacturing processes

KW - Microstructure

KW - Ni-20Cr-18W base superalloy

KW - Tensile properties

KW - Wrought

UR - https://www.scopus.com/pages/publications/84944673212

M3 - 文章

AN - SCOPUS:84944673212

SN - 1002-185X

VL - 44

SP - 2314

EP - 2317

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

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

IS - 9

ER -

As-forged microstructure and tensile properties of Ni-20Cr-18W superalloy

Abstract

Keywords

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