IMECH-IR  > 先进制造工艺力学重点实验室
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)
Corresponding AuthorYu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
Source PublicationOPTICS AND LASER TECHNOLOGY
2019-11-01
Volume119Pages:10
ISSN0030-3992
AbstractThe 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.
KeywordLaser additive manufacturing Solidification Grain size Cooling rate Superalloy
DOI10.1016/j.optlastec.2019.105662
Indexed BySCI ; EI
Language英语
WOS IDWOS:000482244400098
WOS KeywordINCONEL 718 ; PROCESS PARAMETERS ; NUMERICAL-SIMULATION ; METALLIC COMPONENTS ; SURFACE-TENSION ; TEMPERATURE ; DEPOSITION ; CONVECTION ; MORPHOLOGY ; PROFILE
WOS Research AreaOptics ; Physics
WOS SubjectOptics ; Physics, Applied
Funding ProjectNational Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11672304]
Funding OrganizationNational Natural Science Foundation of China
Classification二类/Q1
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80004
Collection先进制造工艺力学重点实验室
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.
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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