Knowledge Management System of Institue of Mechanics, CAS
| Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel | |
Zhang Y(张越)1,3 ; He XL(何秀丽)1,3; Yu G(虞钢)1,2,3; Li SX(李少霞)1,3; Tian CX(田崇鑫)1,3; Ning WJ(宁伟健)1; Zhang YM(张艳梅)1,3
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| Corresponding Author | He, Xiuli([email protected]) ; Yu, Gang([email protected]) |
| Source Publication | OPTICS AND LASER TECHNOLOGY
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| 2022-08-01 | |
| Volume | 152Pages:12 |
| ISSN | 0030-3992 |
| Abstract | 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. |
| Keyword | Laser drilling Keyhole evolution Driving forces Flow pattern Numerical simulation |
| DOI | 10.1016/j.optlastec.2022.108151 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000794981500006 |
| WOS Keyword | FORMATION MECHANISM ; DENSITY ; SPEED |
| WOS Research Area | Optics ; Physics |
| WOS Subject | Optics ; Physics, Applied |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | He, Xiuli ; Yu, Gang |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89394 |
| Collection | 宽域飞行工程科学与应用中心 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang Y,He XL,Yu G,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.Rp_Au:He, Xiuli, Yu, Gang |
| APA | 张越.,何秀丽.,虞钢.,李少霞.,田崇鑫.,...&张艳梅.(2022).Dynamic evolution of keyhole during multi-pulse drilling with a millisecond laser on 304 stainless steel.OPTICS AND LASER TECHNOLOGY,152,12. |
| MLA | 张越,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. |
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| Jp2022FA248.pdf（8555KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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