Microstructure and stress-rupture property of DD32 nickel-based single crystal superalloy fabricated by additive manufacturing

doi:10.1016/j.jallcom.2020.157180

CORC > 金属研究所 > 中国科学院金属研究所

	Microstructure and stress-rupture property of DD32 nickel-based single crystal superalloy fabricated by additive manufacturing
	Ci, Shiwei 1,2; Liang, Jingjing 1,3,4; Li, Jinguo 1,4; Wang, Haiwei 1,2; Zhou, Yizhou 1; Sun, Xiaofeng 1; Ding, Yutian 5
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2021-02-15
卷号	854 页码:12
关键词	Additive manufacturing Nickel-based superalloy Single crystal Stress rupture property Micro structures
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.157180
通讯作者	Liang, Jingjing(jjliang@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
英文摘要	Additive manufacturing (AM) technology is currently undergoing rapid development in the aerospace field. However, due to the intense cracking susceptibility, additive manufacturing of nickel-based single-crystal (SX) superalloys still presents major challenges. In this paper, the crack-free SX superalloy is fabricated directly using pulsed laser. The microstructure and stress rupture property of the additively manufactured SX superalloy after heat treatment are carefully investigated and compared with conventional cast alloy. The results show that the stress rupture life of the AM sample (66.4 h) is longer than that of the cast sample (59.1 h). This is related to the difference of microstructure between AM and cast samples. AM samples have a finer dendritic structure and lower inter-dendritic segregation, which is conducive to solution strengthening and avoids the formation of TCP phase. Besides, the carbides in the AM sample is finer and evenly distributed, which is conducive to precipitation strengthening; The fine carbides are enveloped within layers of y' in the AM samples, which avoids the formation of cracks caused by separation of carbides and the matrix. All of those are beneficial to improve stress rupture properties. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Key R&D Program of China[2017YFA0700703] ; National Key R&D Program of China[2018YFB1100000] ; National Key R&D Program of China[2017YFB1103800] ; National Natural Science Foundation of China, China (NSFC, China)[51771190] ; National Natural Science Foundation of China, China (NSFC, China)[51671189] ; National Natural Science Foundation of China, China (NSFC, China)[U1508213] ; National High Technology Research and Development Program, China (863)[2014AA041701] ; State Key Laboratory of Solidification Processing, China in NWPU[SKLSP201834]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000596248300007
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China, China (NSFC, China) ; National High Technology Research and Development Program, China (863) ; State Key Laboratory of Solidification Processing, China in NWPU
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/158780]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liang, Jingjing; Zhou, Yizhou
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 230026, Peoples R China 3.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 4.Space Mfg Technol, CAS Key Lab, Beijing 100094, Peoples R China 5.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Non Ferrous Me, 287 Langongping Rd, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Ci, Shiwei,Liang, Jingjing,Li, Jinguo,et al. Microstructure and stress-rupture property of DD32 nickel-based single crystal superalloy fabricated by additive manufacturing[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,854:12.
APA	Ci, Shiwei.,Liang, Jingjing.,Li, Jinguo.,Wang, Haiwei.,Zhou, Yizhou.,...&Ding, Yutian.(2021).Microstructure and stress-rupture property of DD32 nickel-based single crystal superalloy fabricated by additive manufacturing.JOURNAL OF ALLOYS AND COMPOUNDS,854,12.
MLA	Ci, Shiwei,et al."Microstructure and stress-rupture property of DD32 nickel-based single crystal superalloy fabricated by additive manufacturing".JOURNAL OF ALLOYS AND COMPOUNDS 854(2021):12.