Cyclic hot corrosion behavior and mechanism of GH4738 superalloy in mixed molten salt

doi:10.1016/j.jmrt.2024.08.162

IMR OpenIR

	Cyclic hot corrosion behavior and mechanism of GH4738 superalloy in mixed molten salt
	Xin, Dan 1; Huang, Hailiang 1; Yang, Yanhong 2; Wang, Guanglei 3; Qu, Jinglong 3; Chen, Yang 1; Wu, Chongchong 1; Zhao, Jiankang 1; Wang, Yinuo 1; Ma, Wenting 1
通讯作者	Huang, Hailiang(huanghailiang894@163.com)
	2024-09-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	32 页码:3456-3464
摘要	The research on the hot corrosion resistance of nickel-based superalloys is critical to determining and enhancing their service life. Therefore, this study investigates the cyclic hot corrosion behavior of GH4738 alloy coated with a mixed salt (75 wt% Na2SO4+25 wt% NaCl) at 750 degrees C and 800 degrees C. X-ray diffractometer (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and transmission electron microscope (TEM) are used to analyze the phase compositions and film structures of the corrosion products, as well as to explore the corrosion mechanism. The results show that a thicker oxide layer is formed at higher temperatures, indicating poorer hot corrosion resistance at elevated temperatures. The corrosion products form at both temperatures to show a distinct layered structure, the outer layer is mainly composed of Cr2O3 and a small amount of TiO2, while the inner layer consists of Al2O3, CrS, and TiS. In addition, it is found that the corrosion mechanism of O, S, and Cl elements in the corrosion process is synergistic and accompanied by alkaline melting.
关键词	GH4738 superalloy Molten salt Cyclic hot corrosion
资助者	National Key R &D Pro-gram of China
DOI	10.1016/j.jmrt.2024.08.162
收录类别	SCI
语种	英语
资助项目	National Key R &D Pro-gram of China[2021YFB3700401]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001316972900001
出版者	ELSEVIER
引用统计	被引频次：4[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/321006/189998
专题	中国科学院金属研究所
通讯作者	Huang, Hailiang
作者单位	1.Yantai Univ, Inst Adv Studies Precis Mat, Yantai 264005, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Gaona Aero Mat Co Ltd, Beijing 10081, Peoples R China
推荐引用方式 GB/T 7714	Xin, Dan,Huang, Hailiang,Yang, Yanhong,et al. Cyclic hot corrosion behavior and mechanism of GH4738 superalloy in mixed molten salt[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,32:3456-3464.
APA	Xin, Dan.,Huang, Hailiang.,Yang, Yanhong.,Wang, Guanglei.,Qu, Jinglong.,...&Ma, Wenting.(2024).Cyclic hot corrosion behavior and mechanism of GH4738 superalloy in mixed molten salt.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,32,3456-3464.
MLA	Xin, Dan,et al."Cyclic hot corrosion behavior and mechanism of GH4738 superalloy in mixed molten salt".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 32(2024):3456-3464.