Microstructure control and hot cracking behavior of the new Ni-Co based superalloy prepared by electron beam smelting layered solidification technology

doi:10.1016/j.jmst.2023.07.047

IMR OpenIR

	Microstructure control and hot cracking behavior of the new Ni-Co based superalloy prepared by electron beam smelting layered solidification technology
	Cui, Hongyang 1,2; Tan, Yi 1,2; Ning, Lidan 1,2; Bai, Rusheng 1,2; You, Xiaogang 1,2; Cui, Chuanyong 3; Li, Pengting 1,2
通讯作者	Li, Pengting(ptli@dlut.edu.cn)
	2024-03-10
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	175 页码:55-71
摘要	The prevention of hot cracking formation is of utmost importance in the production of the new Ni-Co based superalloys through the utilization of the electron beam smelting layered solidification technique (EBSL), as it ensures exceptional homogeneity and dependable consistency of the specimens. In contrast to previous studies that focused on minimizing the liquid film and solidification range, our methodology adopts a distinct approach. In this research, a novel methodology was employed to mitigate internal stresses through the implementation of equiaxed grain layers via an alternately reduced cooling method. This ultimately resulted in the elimination of hot cracking. To be more specific, the transition from a columnar to an equiaxed structure was observed during the layer-by-layer construction process in the fabrication of the new Ni-Co based superalloy in EBSL. The EBSL-Ni-Co superalloy, when subjected to the alternating reduction cooling method, exhibited an internal stress of 49 MPa. This value represents a significant reduction of 83.8% compared to the internal stress observed when employing the linear reduction cooling method. Additionally, the solvus temperature of the gamma - gamma ' eutectic phases in EBSL-Ni-Co superalloys produced by the alternating reduction cooling method is significantly higher. Intriguingly, the N th layer of the EBSL-Ni-Co based superalloys produced by EBSL simultaneously heats treated with the preceding layers. And the low melting point phase gradually dissolved back into the matrix. The implementation of an alternating reduced cooling method successfully mitigated the formation of the liquid film in the gamma - gamma ' eutectic phase and the buildup of internal stresses in the EBSL-Ni-Co superalloy during its manufacturing process. These discoveries open up a novel preparation procedure pathway for the manufacture of crack-free superalloys with superior mechanical characteristics using EBSL. (c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Electron beam smelting layered solidification technology CET Thermal cycling Hot cracking
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Innovation Team Project for Key Fields of Dalian
DOI	10.1016/j.jmst.2023.07.047
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2019YFA0705300] ; National Natural Science Foundation of China[52004051] ; Innovation Team Project for Key Fields of Dalian[2019RT13]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001080417300001
出版者	JOURNAL MATER SCI TECHNOL
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/321006/179437
专题	中国科学院金属研究所
通讯作者	Li, Pengting
作者单位	1.Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China 2.Key Lab Energy Beam Met & Adv Mat Preparat Liaonin, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cui, Hongyang,Tan, Yi,Ning, Lidan,et al. Microstructure control and hot cracking behavior of the new Ni-Co based superalloy prepared by electron beam smelting layered solidification technology[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,175:55-71.
APA	Cui, Hongyang.,Tan, Yi.,Ning, Lidan.,Bai, Rusheng.,You, Xiaogang.,...&Li, Pengting.(2024).Microstructure control and hot cracking behavior of the new Ni-Co based superalloy prepared by electron beam smelting layered solidification technology.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,175,55-71.
MLA	Cui, Hongyang,et al."Microstructure control and hot cracking behavior of the new Ni-Co based superalloy prepared by electron beam smelting layered solidification technology".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 175(2024):55-71.