As-casting structure and homogenization behavior of hundred-kilogram level GH4068 ingot prepared by electron-beam drip melting layered solidification technology

doi:10.1016/j.vacuum.2024.113718

IMR OpenIR

	As-casting structure and homogenization behavior of hundred-kilogram level GH4068 ingot prepared by electron-beam drip melting layered solidification technology
	Bai, Rusheng 1,2; Tan, Yi 1,2; Yang, Lin 1,2; Ning, Lidan 1,2; Cui, Chuanyong 3; Wang, Yunpeng 1; Li, Pengting 1,2
通讯作者	Tan, Yi(lnsolar@dlut.edu.cn)
	2025
发表期刊	VACUUM
ISSN	0042-207X
卷号	231 页码:13
摘要	To expand the size of the electron beam smelted superalloy ingot, the method of electron beam drip melting layer solidification technology (EBDS-LST) was employed to prepare a GH4068 superalloy ingot with a diameter of 220 mm and a height of 550 mm. The ingot's structural characteristics, segregation situation, and homogenization behavior were investigated. The results show that the EBDS-LST GH4068 ingot exhibits no macroscopic segregation, with grains forming an ordered composite structure of "columnar grain-equiaxed grain-columnar grain". There is only primary dendrite present within the ingot, and the precipitated phase between dendrite cores is (gamma+gamma ') eutectic phase only. The electron beam drip melting process effectively reduces the depth of the melt pool, with a melt pool aspect ratio (MPAR) of 7.3. The segregation degree in the solidified portion decreases with an increase in the number of solidification layers. The typical segregation coefficients for Ti and W are K-Ti > 0.7 and K-W<1.5, respectively. The optimal single-stage homogenization process for the ingot was determined to be at 1160 C-degrees for 20h.
关键词	Superalloy Electron beam drip melting As-cast structure Homogenization
资助者	National Key R&D Program of China
DOI	10.1016/j.vacuum.2024.113718
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2019YFA0705300]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001348873400001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：1[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/321006/191079
专题	中国科学院金属研究所
通讯作者	Tan, Yi
作者单位	1.Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China 2.Dalian Univ Technol, Key Lab Energy Beam Met & Adv Mat Preparat Liaonin, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Bai, Rusheng,Tan, Yi,Yang, Lin,et al. As-casting structure and homogenization behavior of hundred-kilogram level GH4068 ingot prepared by electron-beam drip melting layered solidification technology[J]. VACUUM,2025,231:13.
APA	Bai, Rusheng.,Tan, Yi.,Yang, Lin.,Ning, Lidan.,Cui, Chuanyong.,...&Li, Pengting.(2025).As-casting structure and homogenization behavior of hundred-kilogram level GH4068 ingot prepared by electron-beam drip melting layered solidification technology.VACUUM,231,13.
MLA	Bai, Rusheng,et al."As-casting structure and homogenization behavior of hundred-kilogram level GH4068 ingot prepared by electron-beam drip melting layered solidification technology".VACUUM 231(2025):13.