Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing

doi:10.1007/s41230-021-9025-1

IMR OpenIR

	Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing
	Wu, Bin 1,2; Liang, Jing-jing 1,3; Yang, Yan-hong 1,3; Li, Jin-guo 1,3; Zhou, Yi-zhou 1
通讯作者	Liang, Jing-jing(jjliang@imr.ac.cn)
	2021-07-01
发表期刊	CHINA FOUNDRY
ISSN	1672-6421
卷号	18 期号:4 页码:397-408
摘要	In this study, a kind of Ni-based superalloy specially designed for additive manufacturing (AM) was investigated. Thermo-Calc simulation and differential scanning calorimetry (DSC) analysis were used to determine phases and their transformation temperature. Experimental specimens were prepared by laser metal deposition (LMD) and traditional casting method. Microstructure, phase constitution and mechanical properties of the alloy were characterized by scanning electron microscopy (SEM), transmission scanning electron microscopy (TEM), X-ray diffraction (XRD) and tensile tests. The results show that this alloy contains two basic phases, gamma/gamma', in addition to these phases, at least two secondary phases may be present, such as MC carbides and Laves phases. Furthermore, the as-deposited alloy has finer dendrite, its mean primary dendrite arm space (PDAS) is about 30-45 mu m, and the average size of gamma' particles is 100-150 nm. However, the dendrite size of the as-cast alloy is much larger and its PDAS is 300-500 mu m with secondary and even third dendrite arms. Correspondingly, the alloy displays different tensile behavior with different processing methods, and the as-deposited specimen shows better ultimate tensile stress (1,085.7 +/- 51.7 MPa), yield stress (697 +/- 19.5 MPa) and elongation (25.8%+/- 2.2%) than that of the as-cast specimen. The differences in mechanical properties of the alloy are due to the different morphology and size of dendrites, gamma', and Laves phase, and the segregation of elements, etc. Such important information would be helpful for alloy application as well as new alloy development.
关键词	additive manufacturing laser metal deposition Ni-based superalloy tensile behavior TG146 1(+)5 A
资助者	National Science and Technology Major Project ; National Natural Science Foundation of China
DOI	10.1007/s41230-021-9025-1
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[Y2019-VII-0011-0151] ; National Natural Science Foundation of China[51771190]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000696546900014
出版者	SPRINGER SINGAPORE PTE LTD
引用统计	被引频次：6[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/321006/166942
专题	中国科学院金属研究所
通讯作者	Liang, Jing-jing
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Space Mfg Technol CAS Key Lab, Beijing 100094, Peoples R China
推荐引用方式 GB/T 7714	Wu, Bin,Liang, Jing-jing,Yang, Yan-hong,et al. Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing[J]. CHINA FOUNDRY,2021,18(4):397-408.
APA	Wu, Bin,Liang, Jing-jing,Yang, Yan-hong,Li, Jin-guo,&Zhou, Yi-zhou.(2021).Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing.CHINA FOUNDRY,18(4),397-408.
MLA	Wu, Bin,et al."Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing".CHINA FOUNDRY 18.4(2021):397-408.