| Grain size evolution under different cooling rate in laser additive manufacturing of superalloy | |
Shao JY(邵佳昀); Yu G(虞钢) ; He XL(何秀丽); Li SX(李少霞); Chen R(陈茹); Zhao Y(赵尧)
| |
| Corresponding Author | Yu, Gang([email protected]) ; He, Xiuli([email protected]) |
| Source Publication | OPTICS AND LASER TECHNOLOGY
 |
| 2019-11-01 | |
| Volume | 119Pages:10 |
| ISSN | 0030-3992 |
| Abstract | The processing parameters in laser additive manufacturing have a crucial impact on solidification microstructure especially grain size, thus influencing the properties of the final products. In this paper, experiments were conducted to investigate the effects of processing parameters including scanning speed, laser power and powder feeding rate on grain size of the solidified track during laser metal deposition. A three-dimensional model considering heat transfer, phase change and Marangoni convection flow had also been developed to simulate the solidification parameters especially cooling rate (G x R) to illustrate the underlying mechanisms. The experimental and simulated results indicated that cooling rate increased and grain size decreased from 8.7 mu m to 4.7 mu m with the increase of scanning speed from 2 mm/s to 10 mm/s. Contrarily, cooling rate decreased and grain size increased with the increase of laser power and powder feeding rate. The numerical and experimental results provide the additive manufacturing process with the potential of microstructure control and performance optimization. |
| Keyword | Laser additive manufacturing Solidification Grain size Cooling rate Superalloy |
| DOI | 10.1016/j.optlastec.2019.105662 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000482244400098 |
| WOS Keyword | INCONEL 718 ; PROCESS PARAMETERS ; NUMERICAL-SIMULATION ; METALLIC COMPONENTS ; SURFACE-TENSION ; TEMPERATURE ; DEPOSITION ; CONVECTION ; MORPHOLOGY ; PROFILE |
| WOS Research Area | Optics ; Physics |
| WOS Subject | Optics ; Physics, Applied |
| Funding Project | National Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11672304] |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Yu, Gang ; He, Xiuli |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/80003 |
| Collection | 先进制造工艺力学实验室 |
| Recommended Citation GB/T 7714 | Shao JY,Yu G,He XL,et al. Grain size evolution under different cooling rate in laser additive manufacturing of superalloy[J]. OPTICS AND LASER TECHNOLOGY,2019,119:10.Rp_Au:Yu, Gang, He, Xiuli |
| APA | 邵佳昀,虞钢,何秀丽,李少霞,陈茹,&赵尧.(2019).Grain size evolution under different cooling rate in laser additive manufacturing of superalloy.OPTICS AND LASER TECHNOLOGY,119,10. |
| MLA | 邵佳昀,et al."Grain size evolution under different cooling rate in laser additive manufacturing of superalloy".OPTICS AND LASER TECHNOLOGY 119(2019):10. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2019333.pdf（3075KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment