Effects of Trace Aluminum and Titanium on High Temperature Oxidation Behavior of Inconel 690 Alloy

doi:10.11900/0412.1961.2023.00061

IMR OpenIR

	Effects of Trace Aluminum and Titanium on High Temperature Oxidation Behavior of Inconel 690 Alloy
	Xu Wenguo 1,2; Hao Wenjiang 3; Li Yingju 1; Zhao Qingbin 3; Lu Bingyu 1,2; Guo Heyi 1,3; Liu Tianyu 1,2; Feng Xiaohui 1; Yang Yuansheng 1
通讯作者	Li Yingju(yjli@imr.ac.cn) ; Yang Yuansheng(ysyang@imr.ac.cn)
	2023-12-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	59 期号:12 页码:1547-1558
摘要	Inconel 690 alloy is a nickel-based alloy with a high chromium content that provides excellent oxidation and corrosion resistances. The high oxidation resistances of the alloy is attributed to the protective Cr2O3 that forms during oxidation, which prevents the outward diffusion of alloy elements and the inward diffusion of oxygen. However, when the temperature exceeds 1000 degrees C, the volatilization and spallation of the Cr2O3 oxide scale severely reduce the oxidation resistance of the Inconel 690 alloy. The addition of trace active elements is an effective way to improve the oxidation resistance of superalloys; however, the effects of these elements on the oxidation behavior and mechanism of the Inconel 690 alloy remain unclear. In this study, the oxidation behavior of Inconel 690 alloys with varying contents of Al and Ti elements was systematically studied through oxidation kinetics, morphology observation, and element analysis. In addition, the effects of Al, Ti, and their coadditions on the oxidation behavior and mechanism of the Inconel 690 alloy were investigated. The results indicate that the addition of Al reduces the oxidation mass gain and improves the oxidation resistance of the Inconel 690 alloy. Moreover, the addition of Al and Ti accelerates the oxidation rate of the alloy at 850 degrees C, but retards it at 1000 and 1200 degrees C. The positive influence of Al addition can be attributed to the fact that Al2O3 particles precipitated at the grain boundary hinder the diffusion of Cr3+ along the grain boundary. The slow diffusion of Cr3+ inhibits the growth of the Cr2O3 oxide scale and reduces the number of holes in the alloy. As a result, the oxidation resistance of the alloy increases owing to the decrease in the oxidation rate and the increase in adhesion between the oxide scale and the substrate. When Al and Ti are added, Ti-4+(,) which acts as a high-valence ion, is doped into the Cr2O3 scale, promoting the outward diffusion of Cr3+ and accelerating the oxidation rate of the alloy at lower temperatures (850 degrees C). However, during oxidation, Ti tends to converge toward the surface of the Cr2O3 scale and form a nonvolatile Ti-rich oxide layer. The formation of this layer inhibits the volatilization and peeling of Cr2O3, thereby increasing the oxidation resistance of the Inconel 690 alloy at 1000 and 1200 degrees C.
关键词	Inconel 690 alloy high temperature oxidation trace element diffusion oxide scale spallation
资助者	National Natural Science Foundation of China ; Applied Basic Research Programs of Liaoning Province
DOI	10.11900/0412.1961.2023.00061
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51831007] ; Applied Basic Research Programs of Liaoning Province[2023JH2/101300142]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001153597600001
出版者	SCIENCE PRESS
引用统计	被引频次：1[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/321006/184348
专题	中国科学院金属研究所
通讯作者	Li Yingju; Yang Yuansheng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.China Nucl Power Engn Co Ltd, Beijing 100840, Peoples R China
推荐引用方式 GB/T 7714	Xu Wenguo,Hao Wenjiang,Li Yingju,et al. Effects of Trace Aluminum and Titanium on High Temperature Oxidation Behavior of Inconel 690 Alloy[J]. ACTA METALLURGICA SINICA,2023,59(12):1547-1558.
APA	Xu Wenguo.,Hao Wenjiang.,Li Yingju.,Zhao Qingbin.,Lu Bingyu.,...&Yang Yuansheng.(2023).Effects of Trace Aluminum and Titanium on High Temperature Oxidation Behavior of Inconel 690 Alloy.ACTA METALLURGICA SINICA,59(12),1547-1558.
MLA	Xu Wenguo,et al."Effects of Trace Aluminum and Titanium on High Temperature Oxidation Behavior of Inconel 690 Alloy".ACTA METALLURGICA SINICA 59.12(2023):1547-1558.