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

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

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摘要

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.

源语言	英语
页（从-至）	2314-2317
页数	4
期刊	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
卷	44
期	9
出版状态	已出版 - 1 9月 2015

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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.",

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

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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

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

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