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

文献类型：期刊论文

作者Zhang, Yue1,3; He, Xiuli1,3; Yu, Gang1,2,3; Li, Shaoxia1,3; Tian, Chongxi1,3; Ning, Weijian3; Zhang, Yanmei1,3; He XL(何秀丽); Yu G(虞钢); Li SX(李少霞)
刊名OPTICS AND LASER TECHNOLOGY
出版日期2022-08-01
卷号152页码:12
ISSN号0030-3992
关键词Laser drilling Keyhole evolution Driving forces Flow pattern Numerical simulation
DOI10.1016/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
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.,...&田崇鑫.(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.

入库方式： OAI收割

来源：力学研究所

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