Microstructure and mechanical properties of novel Ni-Cr-Co-based superalloy GTAW joints

doi:10.1016/j.jmrt.2024.01.241

IMR OpenIR

	Microstructure and mechanical properties of novel Ni-Cr-Co-based superalloy GTAW joints
	Song, Jiazhe 1; Chen, Yuhua 1; Hao, Xianchao 2; Wang, Min 2; Ma, Yingche 2; Xie, Jilin 1
通讯作者	Chen, Yuhua(ch.yu.hu@163.com)
	2024-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	29 页码:2758-2767
摘要	Recently, a novel Ni-Cr-Co-based superalloy has been developed in China, exhibiting exceptional overall characteristics such as favorable mechanical properties at 800 degrees C, resistance to corrosion and oxidation, as well as remarkable welding capabilities. In this paper, the welding sample of the novel superalloy was prepared using the gas tungsten arc welding (GTAW) method. The conclusion indicates that the GTAW technique can be utilized to fabricate high-quality weld joints filled with superalloy wire. A segregation phenomenon exists between the core and boundary of the dendrite in the fusion zone. The interface of the joints is effectively fused without any separate area. There is an abundance of co-crystallization occurring between the weld metal and the base metal. Besides, the joint has been tested at room temperature (20 degrees C) and high temperature (800 degrees C) for its ultimate tensile strength (UTS). The UTS of the joint is 11780 MPa and 781Mpa at 20 degrees C and 800 degrees C, respectively. Moreover, the positions of the fractures in the two cases are different. At 20 degrees C, the fracture location is in the base metal, while at 800 degrees C, the fracture location is inside the fusion zone. The SEM analysis of the fracture indicates that at 20 degrees C, the joint's tensile fracture surface exhibits transparent mixed fracture mode, and there are numerous small dimples; at 800 degrees C, the dimple on the fracture surface of the joint disappeared, replaced by the feature of smooth fracture along the dendrites.
关键词	New cast superalloy GTAW Microstructures Mechanical properties
资助者	National Natural Science Foundation of China ; Science and Technology Cooperation Special Project of Jiangxi Province ; National Science and Technology Major Project ; Postgraduate Innovation Special Fund Project of Nanchang Hang-kong University
DOI	10.1016/j.jmrt.2024.01.241
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52105355] ; Science and Technology Cooperation Special Project of Jiangxi Province[22025BCJ23017] ; National Science and Technology Major Project[J2019 -VI -0004-0118] ; Postgraduate Innovation Special Fund Project of Nanchang Hang-kong University[YC2022-022]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001185886100001
出版者	ELSEVIER
引用统计	被引频次：42[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185008
专题	中国科学院金属研究所
通讯作者	Chen, Yuhua
作者单位	1.Nanchang Hangkong Univ, Jiangxi Key Lab Forming & Joining Technol Aerosp C, Nanchang 330036, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Song, Jiazhe,Chen, Yuhua,Hao, Xianchao,et al. Microstructure and mechanical properties of novel Ni-Cr-Co-based superalloy GTAW joints[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,29:2758-2767.
APA	Song, Jiazhe,Chen, Yuhua,Hao, Xianchao,Wang, Min,Ma, Yingche,&Xie, Jilin.(2024).Microstructure and mechanical properties of novel Ni-Cr-Co-based superalloy GTAW joints.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,29,2758-2767.
MLA	Song, Jiazhe,et al."Microstructure and mechanical properties of novel Ni-Cr-Co-based superalloy GTAW joints".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 29(2024):2758-2767.