AZ31 镁合金减压激光束焊接中残余氧含量的影响

IF 4.6 2区 物理与天体物理 Q1 OPTICS Optics and Laser Technology Pub Date : 2025-02-17 DOI:10.1016/j.optlastec.2025.112590
Yumo Jiang , Meng Jiang , Xi Chen , Lijun Yang , Jie Wang , Zhe Wang , Xuan Su , Peng He , Yanbin Chen
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With the residual oxygen content increase from 0.297 to 29.7 mg/L under the reduced pressure of 10 kPa, the penetration depth of laser welds of magnesium alloy increases while the weld width decreases. The humps and discontinuous weld formation were observed when the oxygen content was higher than 11.9 mg/L. Molten pool behaviors and interaction of laser and plasma plume for different residual oxygen contents was experimentally and theoretically studied. The spatter occurred accompanied with the oxidation film for the high oxygen content. The large droplet was dragged back to the molten pool. It gradually grew up with the continuous large energy absorbed and then solidified in the oxide film, leading to the hump defects. Besides, the welding plume was gradually suppressed and the condensation particles increased with the decrease of the oxygen content. The residual oxygen content also has an obvious effect on the size and distribution of the condensed metal particles in the plasma plume. The interaction between laser and the plasma plume are the main reason which results in the change of weld formation of different residual oxygen content.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"185 ","pages":"Article 112590"},"PeriodicalIF":4.6000,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of residual oxygen content in reduced pressure laser beam welding of AZ31 magnesium alloy\",\"authors\":\"Yumo Jiang ,&nbsp;Meng Jiang ,&nbsp;Xi Chen ,&nbsp;Lijun Yang ,&nbsp;Jie Wang ,&nbsp;Zhe Wang ,&nbsp;Xuan Su ,&nbsp;Peng He ,&nbsp;Yanbin Chen\",\"doi\":\"10.1016/j.optlastec.2025.112590\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Reduced pressure laser welding is known to provide enhanced penetration depth and reduced defects. 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The spatter occurred accompanied with the oxidation film for the high oxygen content. The large droplet was dragged back to the molten pool. It gradually grew up with the continuous large energy absorbed and then solidified in the oxide film, leading to the hump defects. Besides, the welding plume was gradually suppressed and the condensation particles increased with the decrease of the oxygen content. The residual oxygen content also has an obvious effect on the size and distribution of the condensed metal particles in the plasma plume. 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Effect of residual oxygen content in reduced pressure laser beam welding of AZ31 magnesium alloy
Reduced pressure laser welding is known to provide enhanced penetration depth and reduced defects. The effect of atmospheric pressure on the weld formation and physical process of laser welding has been well investigated, while the effect of atmospheric composition is rarely reported. In this work, the effect of residual oxygen content in reduced pressure laser beam welding of magnesium alloy was systematically investigated. The experimental results showed the residual oxygen content in the low vacuum had a significant effect on the weld formation of magnesium alloy. With the residual oxygen content increase from 0.297 to 29.7 mg/L under the reduced pressure of 10 kPa, the penetration depth of laser welds of magnesium alloy increases while the weld width decreases. The humps and discontinuous weld formation were observed when the oxygen content was higher than 11.9 mg/L. Molten pool behaviors and interaction of laser and plasma plume for different residual oxygen contents was experimentally and theoretically studied. The spatter occurred accompanied with the oxidation film for the high oxygen content. The large droplet was dragged back to the molten pool. It gradually grew up with the continuous large energy absorbed and then solidified in the oxide film, leading to the hump defects. Besides, the welding plume was gradually suppressed and the condensation particles increased with the decrease of the oxygen content. The residual oxygen content also has an obvious effect on the size and distribution of the condensed metal particles in the plasma plume. The interaction between laser and the plasma plume are the main reason which results in the change of weld formation of different residual oxygen content.
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来源期刊
CiteScore
8.50
自引率
10.00%
发文量
1060
审稿时长
3.4 months
期刊介绍: Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems
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