Grain size evolution under different cooling rate in laser additive manufacturing of superalloy
文献类型：期刊论文
| 作者 | 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)
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| 刊名 | OPTICS AND LASER TECHNOLOGY
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 119页码:10 |
| 关键词 | Laser additive manufacturing Solidification Grain size Cooling rate Superalloy |
| ISSN号 | 0030-3992 |
| DOI | 10.1016/j.optlastec.2019.105662 |
| 通讯作者 | Yu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn) |
| 英文摘要 | 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. |
| 分类号 | 二类/Q1 |
| WOS关键词 | INCONEL 718 ; PROCESS PARAMETERS ; NUMERICAL-SIMULATION ; METALLIC COMPONENTS ; SURFACE-TENSION ; TEMPERATURE ; DEPOSITION ; CONVECTION ; MORPHOLOGY ; PROFILE |
| 资助项目 | National Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11672304] |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000482244400098 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/80003]  |
| 专题 | 力学研究所_先进制造工艺力学重点实验室 |
| 推荐引用方式 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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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