Hot corrosion behavior of IN718 alloy and its effect on mechanical properties

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	Hot corrosion behavior of IN718 alloy and its effect on mechanical properties
	Lou Xueming; Sun Wenru; Guo Shouren; Hu Zhuangqi
刊名	RARE METAL MATERIALS AND ENGINEERING
	2008-02-01
卷号	37 期号:2 页码:259-263
关键词	hot corrosion IN718 alloy mechanical properties grain-boundary
ISSN号	1002-185X
通讯作者	Lou Xueming(louxueming@imr.ac.cn)
英文摘要	The hot corrosion behavior of IN718 alloy in the mixed melted salts of 75%Na2SO4+25%NaCl at 650 degrees C for 100 h and its effect on the mechanical properties of the alloy have been investigated. The results show that the corrosion scale is made up of two layers. The top layer is mainly composed of Fe3O4, FeCr2O4 and Cr2O3, and the inner layer is mainly composed of Ni and nickel sulfide. Sulfur can easily diffuse along grain boundaries and hence sulfide is formed there. The immersion of the alloy in the mixed salts at 650 degrees C for 100 h hardly reduces the tensile properties at room temperature and the tensile strength at 650 degrees C, but decreases the tensile plasticity slightly, and the 650 degrees C, 700 MPa stress rupture properties noticeably due to the decohesion of grain boundaries by sulfur. The hot corrosion is accelerated when a stress is added. The hot corrosion process and the relationship among the stress, hot corrosion rate and mechanical properties are discussed.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000254034500016
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/93508]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lou Xueming
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Lou Xueming,Sun Wenru,Guo Shouren,et al. Hot corrosion behavior of IN718 alloy and its effect on mechanical properties[J]. RARE METAL MATERIALS AND ENGINEERING,2008,37(2):259-263.
APA	Lou Xueming,Sun Wenru,Guo Shouren,&Hu Zhuangqi.(2008).Hot corrosion behavior of IN718 alloy and its effect on mechanical properties.RARE METAL MATERIALS AND ENGINEERING,37(2),259-263.
MLA	Lou Xueming,et al."Hot corrosion behavior of IN718 alloy and its effect on mechanical properties".RARE METAL MATERIALS AND ENGINEERING 37.2(2008):259-263.