Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel

doi:10.1016/j.optlastec.2022.108151

CORC > 力学研究所 > 中国科学院力学研究所 > 宽域飞行工程科学与应用中心

	Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel
	Zhang, Yue 1,3; He, Xiuli 1,3; Yu, Gang 1,2,3; Li, Shaoxia 1,3; Tian, Chongxi 1,3; Ning, Weijian 3; Zhang, Yanmei 1,3
刊名	OPTICS AND LASER TECHNOLOGY
	2022-08-01
卷号	152 页码:12
关键词	Laser drilling Keyhole evolution Driving forces Flow pattern Numerical simulation
ISSN号	0030-3992
DOI	10.1016/j.optlastec.2022.108151
通讯作者	He, Xiuli(xlhe@imech.ac.cn) ; Yu, Gang(gyu@imech.ac.cn)
英文摘要	The efficiency of millisecond laser drilling is high due to the molten material ejection, and is applied in many industries like aerospace, automobile and electronics. However, there may be some defects such as hole blockage, low machining accuracy and low repeatability, especially for the process of multi-pulse drilling. The melt flow remaining inside keyhole due to inefficient ejection, is responsible for the formation of those defects. Hence, it is necessary to investigate the dynamic behavior of melt flow during multi-pulse drilling. In this paper, the dynamic evolution of keyhole is investigated combining in-situ observation and numerical simulation methods. According to the ejection efficiency, the multi-pulse drilling process can be divided into three periods, namely rapid drilling period, linear drilling period, and moderate drilling period. The melt flow behaves differently in each period. In rapid drilling period, a conical keyhole is formed in the end. The melt flow behavior is affected dominantly by the recoil pressure when the laser is on and by the surface tension when the laser is off. In linear drilling period, the blocked keyhole occurs occasionally. The melt flow behavior is affected by gravity and recoil pressure when the laser is on and by the surface tension and recoil pressure when the laser is off. In moderate drilling period, the keyhole profile is wavy. The melt flow behavior is affected by surface tension and recoil pressure dominantly during the whole period. The melt flow transition and its influence factors are investigated in this paper, which is helpful for understanding the physical processes during the multi-pulse laser irradiation process.
WOS关键词	FORMATION MECHANISM ; DENSITY ; SPEED
WOS研究方向	Optics ; Physics
语种	英语
WOS记录号	WOS:000794981500006
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89393]
专题	宽域飞行工程科学与应用中心
通讯作者	He, Xiuli; Yu, Gang
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yue,He, Xiuli,Yu, Gang,et al. Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel[J]. OPTICS AND LASER TECHNOLOGY,2022,152:12.
APA	Zhang, Yue.,He, Xiuli.,Yu, Gang.,Li, Shaoxia.,Tian, Chongxi.,...&Zhang, Yanmei.(2022).Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel.OPTICS AND LASER TECHNOLOGY,152,12.
MLA	Zhang, Yue,et al."Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel".OPTICS AND LASER TECHNOLOGY 152(2022):12.