IMECH-IR  > 非线性力学国家重点实验室
Driving mechanism of keyhole evolution during multi-pulse drilling with a millisecond laser
Zhang Y(张越); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Ning WJ(宁伟健)
Corresponding AuthorYu, Gang(gyu@imech.ac.cn) ; He, XiuLi(xlhe@imech.ac.cn)
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2019-10-01
Volume62Issue:10Pages:7
ISSN1674-7348
AbstractTo better understand the physical processes of multi-pulse laser drilling, this study investigates the keyhole evolution and its driving mechanism in a time-resolved observation system. The evolution characteristics suggested a two-phase process of rapid penetration followed by moderate penetration. As revealed in the ejection and vaporization behavior, the keyhole evolution was dominated by ejection and vaporization during the rapid and moderate penetration stages, respectively. In a single laser-pulsed drilling experiment, the driving mechanism itself was found to be affected by the dimensionless laser power density. The effect of dimensionless laser power density on depth increment was then discussed by comparing the experimental observations with numerical simulation results. The results further confirmed the driving mechanism of the keyhole evolution. The results in this paper are useful for understanding the driving mechanism of the keyhole evolution during multi-pulse laser drilling.
Keywordmulti-pulse laser drilling melt ejection vaporization keyhole evolution driving mechanism
DOI10.1007/s11433-019-9418-4
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000483233000001
WOS KeywordNUMERICAL-SIMULATION ; HEAT-TRANSFER ; HOLE ; VAPORIZATION ; DYNAMICS ; EJECTION ; MODEL ; FLOW
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding ProjectNational Natural Science Foundation of China[11672304] ; National Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11272316] ; National Natural Science Foundation of China[11272317] ; Plan of Beijing Municipal Commission of Science and Technology[Z181100003818015]
Funding OrganizationNational Natural Science Foundation of China ; Plan of Beijing Municipal Commission of Science and Technology
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79968
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Zhang Y,Yu G,He XL,et al. Driving mechanism of keyhole evolution during multi-pulse drilling with a millisecond laser[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2019,62(10):7.
APA 张越,虞钢,何秀丽,李少霞,&宁伟健.(2019).Driving mechanism of keyhole evolution during multi-pulse drilling with a millisecond laser.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,62(10),7.
MLA 张越,et al."Driving mechanism of keyhole evolution during multi-pulse drilling with a millisecond laser".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 62.10(2019):7.
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