Role of carbon in modifying solidification and microstructure of a Ni-based superalloy with high Al and Ti contents

doi:10.1007/s42243-020-00408-x

IMR OpenIR

	Role of carbon in modifying solidification and microstructure of a Ni-based superalloy with high Al and Ti contents
	Zhao, Guang-di 1; Zang, Xi-min 1; Sun, Wen-ru 2
通讯作者	Zhao, Guang-di(gdzhao12s@alum.imr.ac.cn)
	2020-04-28
发表期刊	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN	1006-706X
页码	13
摘要	The effect of carbon ranging from 0.014 to 0.071 wt.% on the solidification and microstructure of a Ni-based superalloy with high Al and Ti contents was studied. The results show that the increase in carbon addition significantly increases the size and volume fraction of MC carbides and promotes the change of their morphology from blocky to elongated shape. However, the carbon addition obviously decreases the size and volume fraction of eutectic (gamma + gamma ') and reduces eta phase and borides formation. The change in carbide characteristics is mainly because of the increasing carbide-forming element and carbides precipitation temperature with the increase in carbon which favors the growth of them along the interdendritic liquid film. MC carbides are formed at an earlier solidification stage than the eutectic (gamma + gamma '). The increased carbide formation consumes more Ti, which delays and reduces the eutectic (gamma + gamma ') precipitation. The delay of eutectic (gamma + gamma ') precipitation leads to a deeper undercooling, which significantly decreases the critical Ti concentration for its precipitation. This, in turn, lowers Ti/Al ratio in residual liquids ahead of the eutectic (gamma + gamma ') and hence reduces eta formation subsequently. B and Zr are slightly enriched in the carbides, which are considered during discussing how carbon influences the eutectic (gamma + gamma ') precipitation.
关键词	Carbon Ni-based superalloy Solidification Segregation Eutectic (gamma plus gamma ') MC carbide
资助者	National Natural Science Foundation of China ; Doctor Start-up Fund of Liaoning Province
DOI	10.1007/s42243-020-00408-x
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51904146] ; National Natural Science Foundation of China[U1960203] ; Doctor Start-up Fund of Liaoning Province[2019-BS-125]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000529464700001
出版者	SPRINGER
引用统计	被引频次：24[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/321006/138611
专题	中国科学院金属研究所
通讯作者	Zhao, Guang-di
作者单位	1.Univ Sci & Technol Liaoning, Sch Mat & Met, Anshan 114051, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Guang-di,Zang, Xi-min,Sun, Wen-ru. Role of carbon in modifying solidification and microstructure of a Ni-based superalloy with high Al and Ti contents[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2020:13.
APA	Zhao, Guang-di,Zang, Xi-min,&Sun, Wen-ru.(2020).Role of carbon in modifying solidification and microstructure of a Ni-based superalloy with high Al and Ti contents.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,13.
MLA	Zhao, Guang-di,et al."Role of carbon in modifying solidification and microstructure of a Ni-based superalloy with high Al and Ti contents".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL (2020):13.