Microstructural evolution and precipitated phase characteristics in the fusion zone for the as-repaired Inconel 718 alloy by directed energy deposition additive manufacturing
文献类型：期刊论文
| 作者 | Zhang, Yiting2; Lan, Liangyun1,2; Shi, Quanqiang3 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 204页码:9 |
| 关键词 | As-repaired Inconel 718 alloy Fusion zone Microstructural evolution Precipitated phase characteristics Micro-hardness |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2023.113222 |
| 通讯作者 | Lan, Liangyun(lanly@me.neu.edu.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:001051844300001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/178957]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lan, Liangyun |
| 作者单位 | 1.Northeastern Univ, Key Lab Vibrat & Control Aeroprop Syst, Minist Educ China, Shenyang 110819, Peoples R China 2.Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Liaoning, 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. |
入库方式： OAI收割
来源：金属研究所
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