Grain size evolution under different cooling rate in laser additive manufacturing of superalloy

doi:10.1016/j.optlastec.2019.105662

IMECH-IR > 先进制造工艺力学实验室

	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)
通讯作者	Yu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
发表期刊	OPTICS AND LASER TECHNOLOGY
	2019-11-01
卷号	119 页码:10
ISSN	0030-3992
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.
关键词	Laser additive manufacturing Solidification Grain size Cooling rate Superalloy
DOI	10.1016/j.optlastec.2019.105662
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000482244400098
关键词[WOS]	INCONEL 718 ; PROCESS PARAMETERS ; NUMERICAL-SIMULATION ; METALLIC COMPONENTS ; SURFACE-TENSION ; TEMPERATURE ; DEPOSITION ; CONVECTION ; MORPHOLOGY ; PROFILE
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Applied
资助项目	National Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11672304]
项目资助者	National Natural Science Foundation of China
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Yu, Gang ; He, Xiuli
引用统计	被引频次：77[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/80003
专题	先进制造工艺力学实验室
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.

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