Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process

doi:10.1016/j.msea.2020.139438

CORC > 金属研究所 > 中国科学院金属研究所

	Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process
	Tang, Ling 2,3; Liang, Jingjing 2,4; Cui, Chuanyong 2; Li, Jinguo 2,4; Zhou, Yizhou 2; Sun, Xiaofeng 2; Ding, Yutian 1
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-06-01
卷号	786 页码:10
关键词	Additive manufacturing Ni-Co base Superalloy Tensile strength Deformation mechanism
ISSN号	0921-5093
DOI	10.1016/j.msea.2020.139438
通讯作者	Liang, Jingjing(jjliang@imr.ac.cn) ; Cui, Chuanyong(chycui@imr.ac.cn)
英文摘要	Microstructures and tensile properties of a Ni-Co base superalloy containing different Co contents made by additive manufacturing (AM) after standard heat treatment have been investigated. Microstructure observation by scanning electron microscopy (SEM) reveals that a great deal of eta precipitates form in the interdendritic region and distribute linearly along the columnar microstructure in 5Co alloy. In addition, transmission electron microscopy (TEM) results reveal that spherical gamma' phase can be found in 5Co alloy and nearly cuboidal gamma' phase can been observed in 23Co alloy. The different morphologies of the gamma' precipitate can be attributed to the different gamma' compositions and the differences in gamma/gamma' lattice misfit in the two alloys. The results of tensile tests reveal that, when tested below 500 degrees C, the ultimate strength and the elongation of the alloys made by AM are lower than that of the cast & wrought (C&W) alloys. When tested at 750 degrees C and 800 degrees C, alloys made by AM exhibit higher yield strength and superior plasticity. With the increment of the testing temperature, deformation mechanism of the alloys transforms from dislocation glide to stacking fault shearing and deformation twinning. Increasing of Co content can decrease the stacking fault energy (SFE) and facilitate the initiation of twinning, therefore, deformation mechanisms between the 5Co alloy and 23Co alloy made by AM are of notable difference.
资助项目	National Key R&D Program of China[2017FB1103800] ; National Key R&D Program of China[2018FB1106600] ; National Key R&D Program of China[2017YFA0700703] ; National Key R&D Program of China[2018FB1106000] ; National Key R&D Program of China[2019YFA0705304] ; National Natural Science Foundation of China (NSFC)[51771190] ; National Natural Science Foundation of China (NSFC)[51671189] ; National Natural Science Foundation of China (NSFC)[U1508213] ; National High Technology Research and Development Program (863)[2014AA041701] ; State Key Laboratory of Solidification Processing in NWPU[SKLSP201834]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000541737900032
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National High Technology Research and Development Program (863) ; State Key Laboratory of Solidification Processing in NWPU
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139510]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liang, Jingjing; Cui, Chuanyong
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou 730000, 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, 96 Jinzhai Rd, Hefei 230026, Peoples R China 4.Space Mfg Technol CAS Key Lab, Beijing 100094, Peoples R China
推荐引用方式 GB/T 7714	Tang, Ling,Liang, Jingjing,Cui, Chuanyong,et al. Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,786:10.
APA	Tang, Ling.,Liang, Jingjing.,Cui, Chuanyong.,Li, Jinguo.,Zhou, Yizhou.,...&Ding, Yutian.(2020).Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,786,10.
MLA	Tang, Ling,et al."Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 786(2020):10.