The microstructure and precipitated phase dependence of plastic deformation and fracture mechanism in repaired IN718 alloy by directed energy deposition
文献类型：期刊论文
| 作者 | Zhang, Yiting1; Lan, Liangyun1,2; Shi, Quanqiang3 |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2024-06-30 |
| 卷号 | 990页码:12 |
| 关键词 | Repaired IN718 alloy Microstructural evolution Precipitate behaviors Plastic deformation Fracture mechanism |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2024.174466 |
| 通讯作者 | Lan, Liangyun(lanly@me.neu.edu.cn) |
| 英文摘要 | This work studied microstructural evolution, precipitate behaviors, and micro-hardness distribution along the built direction of directed energy deposited IN718 alloy. In combination with digital image correlation and crystallographic orientation analysis, the plastic deformation and fracture mechanisms of coarse columnar grains were explored in detail. The columnar grains in the deposition zone (DZ) grow along the <001> direction in the crystallography and gradually widen with increasing built height. The misorientation angle per unit length within individual columnar grains first decreases and then slows down to similar to 0.07 degrees/mu m when the deposition height is similar to 1.8 mm. The micro-hardness in the DZ is gradually decreased along the built direction, which may be due to the increasing average columnar grain width and primary dendrite arm spacing, as well as reducing the volume fraction of the gamma" + gamma' phases. During the uniaxial tensile loading, most plastic deformation always occurs in the DZ irrespective of the lowest hardness in the heat-affected zone (HAZ). The nucleation of microvoids is ascribed to the granular Laves phase debonding from the gamma matrix. The number of microvoids gradually decreases with increasing distance from the fracture surface, which may be attributed to the strain-controlled nucleation of microvoids. EBSD results substantiated that the columnar grains near the fracture surface occur to severe lattice rotation, leading to the Kernel misorientation angle distribution in each grain interior increasing to about 1 degrees similar to 4 degrees. |
| 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 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001229183300001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities of China |
| 源URL |  |
| 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, 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. The microstructure and precipitated phase dependence of plastic deformation and fracture mechanism in repaired IN718 alloy by directed energy deposition[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,990:12. |
| APA | Zhang, Yiting,Lan, Liangyun,&Shi, Quanqiang.(2024).The microstructure and precipitated phase dependence of plastic deformation and fracture mechanism in repaired IN718 alloy by directed energy deposition.JOURNAL OF ALLOYS AND COMPOUNDS,990,12. |
| MLA | Zhang, Yiting,et al."The microstructure and precipitated phase dependence of plastic deformation and fracture mechanism in repaired IN718 alloy by directed energy deposition".JOURNAL OF ALLOYS AND COMPOUNDS 990(2024):12. |
入库方式： OAI收割
来源：金属研究所
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