Effect of B on High Temperature Oxidation Behavior of a Nickel-base Superalloy with High Al and Ti Contents

IMR OpenIR

	Effect of B on High Temperature Oxidation Behavior of a Nickel-base Superalloy with High Al and Ti Contents
	Zhao Guangdi 1; Zang Ximin 1; Li Wanming 1; Xue Chaochao 2
通讯作者	Zhao Guangdi(gdzhao12s@alum.imr.ac.cn)
	2020-06-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	49 期号:6 页码:2109-2117
摘要	Three U720Li ingots with different B contents were produced by vacuum induction melting and afterwards they were fully homogenized. The effect of B on the isothermal oxidation behavior of as-homogenized U720Li alloy at 1100 degrees C was investigated by a discontinuous increasing weight method. After the homogenization treatment, extremely serious B depletion from the alloy matrix is found by ICP-AES, indicating that B could diffuse rapidly towards the oxide scale during high temperature air exposure (above 1100 degrees C). The B addition decreases the oxidation rate and reduces the volume fraction of pores and the thickness of gamma' depleted layer. The scales formed on both low B and high B alloys consist of three layers: the loose outer layer is composed of (Ni/Co)O, TiO2 and complex spinel, the compact intermediate layer is mainly Cr2O3 and discrete internal oxides are Al2O3+TiO2. It is demonstrated that B improves the oxidation resistance mainly by promoting the formation of a more continuous and protective Cr2O3 intermediate layer.
关键词	nickel-base superalloy oxidation boron
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000552452000040
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
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/321006/139907
专题	中国科学院金属研究所
通讯作者	Zhao Guangdi
作者单位	1.Univ Sci & Technol Liaoning, Anshan 114051, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao Guangdi,Zang Ximin,Li Wanming,et al. Effect of B on High Temperature Oxidation Behavior of a Nickel-base Superalloy with High Al and Ti Contents[J]. RARE METAL MATERIALS AND ENGINEERING,2020,49(6):2109-2117.
APA	Zhao Guangdi,Zang Ximin,Li Wanming,&Xue Chaochao.(2020).Effect of B on High Temperature Oxidation Behavior of a Nickel-base Superalloy with High Al and Ti Contents.RARE METAL MATERIALS AND ENGINEERING,49(6),2109-2117.
MLA	Zhao Guangdi,et al."Effect of B on High Temperature Oxidation Behavior of a Nickel-base Superalloy with High Al and Ti Contents".RARE METAL MATERIALS AND ENGINEERING 49.6(2020):2109-2117.