Improved High-Temperature Oxidation Properties for Mn-Containing Beta-Gamma TiAl with W Addition

doi:10.1007/s11085-020-09964-9

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	Improved High-Temperature Oxidation Properties for Mn-Containing Beta-Gamma TiAl with W Addition
	Zhao, Pengxiang 2,3; Li, Xiaobing 1,2; Tang, Hongjian 2,3; Ma, Yingche 1,2; Chen, Bo 1,2; Xing, Weiwei 1,2; Liu, Kui 1,2; Yu, Jian 4
刊名	OXIDATION OF METALS
	2020-03-19
页码	16
关键词	Titanium aluminides Cyclic oxidation Manganese Tungsten
ISSN号	0030-770X
DOI	10.1007/s11085-020-09964-9
通讯作者	Li, Xiaobing(xbli@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn)
英文摘要	TiAl-based alloys containing relatively high Mn (e.g., Ti-42Al-5Mn (in at.%)) possess excellent hot workability and cost-effective advantages, but may also have poor oxidation resistance at high temperature. Hence, additional attention needs to be paid on the oxidation resistance of these alloys. In this study, a Mn-containing gamma-TiAl-based alloy with the composition of Ti-42Al-5Mn has been chosen, and the oxidation behavior of this alloy with different W additions under thermal cycling conditions at 800 degrees C was investigated. The morphology and the composition distribution of the oxide scale were analyzed by means of scanning electron microscopy equipped with energy-dispersive spectroscopy, X-ray diffractometry and X-ray photoelectron spectroscopy. Auger electron spectroscopy depth profiling was used to investigate the effect of W on the initial stage of oxidation. It shows that the addition of 1 (at.%) W can significantly reduce the oxidation mass gain, and the oxidation reaction rate constant is decreased by an order of magnitude. The adherence of oxide scale is greatly enhanced with no spallation observed in Ti-42Al-5Mn-(0.8, 1)W after 100-h cyclic oxidation. Tungsten promotes the selective oxidation of Al and formation of a denser oxide scale which prevents the inward diffusion of oxygen; in this way, high-temperature oxidation resistance of the alloy is improved.
资助项目	National Natural Science Foundation of China[51971215] ; National Natural Science Foundation of Liaoning province of China[2019-MS-330] ; China postdoctoral science foundation[2019M661152]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER/PLENUM PUBLISHERS
WOS记录号	WOS:000521009800001
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of Liaoning province of China ; China postdoctoral science foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138067]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Xiaobing; Liu, Kui
作者单位	1.IMR NMSA, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110014, Peoples R China 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 4.Weichai Power Co Ltd, Weichai 261061, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Pengxiang,Li, Xiaobing,Tang, Hongjian,et al. Improved High-Temperature Oxidation Properties for Mn-Containing Beta-Gamma TiAl with W Addition[J]. OXIDATION OF METALS,2020:16.
APA	Zhao, Pengxiang.,Li, Xiaobing.,Tang, Hongjian.,Ma, Yingche.,Chen, Bo.,...&Yu, Jian.(2020).Improved High-Temperature Oxidation Properties for Mn-Containing Beta-Gamma TiAl with W Addition.OXIDATION OF METALS,16.
MLA	Zhao, Pengxiang,et al."Improved High-Temperature Oxidation Properties for Mn-Containing Beta-Gamma TiAl with W Addition".OXIDATION OF METALS (2020):16.