Microstructural evolution and precipitated phase characteristics in the fusion zone for the as-repaired Inconel 718 alloy by directed energy deposition additive manufacturing

doi:10.1016/j.matchar.2023.113222

IMR OpenIR

	Microstructural evolution and precipitated phase characteristics in the fusion zone for the as-repaired Inconel 718 alloy by directed energy deposition additive manufacturing
	Zhang, Yiting 1; Lan, Liangyun 1,2; Shi, Quanqiang 3
通讯作者	Lan, Liangyun(lanly@me.neu.edu.cn)
	2023-10-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	204 页码:9
摘要	In this study, five laser powers were employed to repair Inconel 718 alloy by directed energy deposition additive manufacturing technology. Under various solidification conditions, microstructural evolution and precipitated phase characteristics in the fusion zone (FZ) of the as-repaired Inconel 718 specimens were investigated. The results showed that the main dendritic morphology in the FZ changes from equiaxed dendrites to columnar dendrites with increasing laser power, accompanied with the morphological evolution of numerous Laves phases from a long-chained shape to a blocky shape. However, these morphological changes for the Laves phase are not only relevant to the solidification structure characteristics but also affected by the repetitive vertical thermal cycles induced by layer-by-layer deposition because multiple thermal cycles could be regarded as conducting mild heat treatment to the FZ microstructure. On the one hand, the gradually increasing heat accumulation effects are conducive to partially dissolving Laves phase with increasing laser power; on the other hand, there are a number of & gamma;& PRIME; phase, & gamma;& PRIME; phase and & delta; phases precipitated in the Nb-rich zone. When laser power is 1400 W, the volume fraction of the Laves + & delta; phases is the highest but the volume fraction of the & gamma;& PRIME; + & gamma;& PRIME; phases is the lowest among the five as-repaired specimens, resulting in the lowest micro-hardness.
关键词	As-repaired Inconel 718 alloy Fusion zone Microstructural evolution Precipitated phase characteristics Micro-hardness
资助者	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities of China
DOI	10.1016/j.matchar.2023.113222
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51605084] ; Fundamental Research Funds for the Central Universities of China[N2103021]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001051844300001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：15[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/321006/178958
专题	中国科学院金属研究所
通讯作者	Lan, Liangyun
作者单位	1.Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Liaoning, Peoples R China 2.Northeastern Univ, Key Lab Vibrat & Control Aeroprop Syst, Minist Educ China, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yiting,Lan, Liangyun,Shi, Quanqiang. Microstructural evolution and precipitated phase characteristics in the fusion zone for the as-repaired Inconel 718 alloy by directed energy deposition additive manufacturing[J]. MATERIALS CHARACTERIZATION,2023,204:9.
APA	Zhang, Yiting,Lan, Liangyun,&Shi, Quanqiang.(2023).Microstructural evolution and precipitated phase characteristics in the fusion zone for the as-repaired Inconel 718 alloy by directed energy deposition additive manufacturing.MATERIALS CHARACTERIZATION,204,9.
MLA	Zhang, Yiting,et al."Microstructural evolution and precipitated phase characteristics in the fusion zone for the as-repaired Inconel 718 alloy by directed energy deposition additive manufacturing".MATERIALS CHARACTERIZATION 204(2023):9.