The investigation of carbides evolution in a cobalt-base superalloy at elevated temperature

IMR OpenIR

	The investigation of carbides evolution in a cobalt-base superalloy at elevated temperature
	Gui, Weimin; Zhang, Hongyu; Yang, Min; Jin, Tao; Sun, Xiaofeng; Zheng, Qi; Zheng, Q (reprint author), Chinese Acad Sci, Superalloys Div, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
	2017-02-25
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	695 页码:1271-1278
摘要	The carbides evolution characteristics and mechanisms in a cobalt-base superalloy at elevated temperatures between 1140 and 1265 degrees C have been investigated to provide the basis for potential service and heat treatment of the alloy. The in-situ transformation of M7C3 -> M23C6 is observed directly, which has not been reported in previous studies of cobalt-base superalloys. M23C6 carbide nucleates at the M7C3/ matrix interface due to the coherent relationship between M23C6 carbide and the matrix, and grows towards M7C3 carbide. On the other hand, it is found that primary MC carbide degenerates and releases a large number of Ti and W. Thus, residual MC carbide exhibits increased concentration ratios for Ta and Zr and shows enhanced thermal stability. The results indicate that the degeneration behavior of MC carbide is temperature dependent: MC decomposes into M6C carbide at lower temperature and dissolves partially into the matrix at higher temperature. (C) 2016 Elsevier B.V. All rights reserved.; The carbides evolution characteristics and mechanisms in a cobalt-base superalloy at elevated temperatures between 1140 and 1265 degrees C have been investigated to provide the basis for potential service and heat treatment of the alloy. The in-situ transformation of M7C3 -> M23C6 is observed directly, which has not been reported in previous studies of cobalt-base superalloys. M23C6 carbide nucleates at the M7C3/ matrix interface due to the coherent relationship between M23C6 carbide and the matrix, and grows towards M7C3 carbide. On the other hand, it is found that primary MC carbide degenerates and releases a large number of Ti and W. Thus, residual MC carbide exhibits increased concentration ratios for Ta and Zr and shows enhanced thermal stability. The results indicate that the degeneration behavior of MC carbide is temperature dependent: MC decomposes into M6C carbide at lower temperature and dissolves partially into the matrix at higher temperature. (C) 2016 Elsevier B.V. All rights reserved.
部门归属	[gui, weimin ; zhang, hongyu ; jin, tao ; sun, xiaofeng ; zheng, qi] chinese acad sci, superalloys div, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [gui, weimin] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [yang, min] northwestern polytech univ, state key lab solidificat proc, xian 710072, peoples r china
关键词	Cobalt-base Superalloy M7c3 Decomposition Mc Degeneration Microstructure Heat Treatment
学科领域	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China [51331005, 11332010]; High Technology Research and Development Program of China [2014AA041701]
收录类别	SCI
语种	英语
WOS记录号	WOS:000391817600157
引用统计	被引频次：73[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/321006/78281
专题	中国科学院金属研究所
通讯作者	Zheng, Q (reprint author), Chinese Acad Sci, Superalloys Div, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Gui, Weimin,Zhang, Hongyu,Yang, Min,et al. The investigation of carbides evolution in a cobalt-base superalloy at elevated temperature[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,695:1271-1278.
APA	Gui, Weimin.,Zhang, Hongyu.,Yang, Min.,Jin, Tao.,Sun, Xiaofeng.,...&Zheng, Q .(2017).The investigation of carbides evolution in a cobalt-base superalloy at elevated temperature.JOURNAL OF ALLOYS AND COMPOUNDS,695,1271-1278.
MLA	Gui, Weimin,et al."The investigation of carbides evolution in a cobalt-base superalloy at elevated temperature".JOURNAL OF ALLOYS AND COMPOUNDS 695(2017):1271-1278.