Laser induced arc dynamics destabilization in laser-arc hybrid welding

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dc.contributor.authorMu, Zhongyan
dc.contributor.authorChen, Xin
dc.contributor.authorHu, Renzhi
dc.contributor.authorLin, Sanbao
dc.contributor.authorPang, Shengyong
dc.date.accessioned2020-07-27T14:53:01Z
dc.date.available2020-07-27T14:53:01Z
dc.date.issued2019-12-05
dc.description.abstractThe interaction between laser and arc plasma is a central issue in laser-arc hybrid welding. We report a new interaction phenomenon called laser destabilizing arc dynamics in kilowatt fiber laser-TIG hybrid welding of 316L stainless steel. We found the laser action significantly oscillates the arc tail with a 1–3 kHz high frequency. Direct numerical simulation demonstrates that the destabilization mechanism is due to the high-speed oscillated metal vapor ejecting from the mesoscopic keyhole. More interestingly, the high-speed metal vapor could contrict the arc plasma by physical shielding. This provides a fundamentally different explanation from the generally adopted metal vapor ionization theory for laser constrict arc plasma phenomenon. Also, the results substantiate that the arc plasma cannot easily enter into the keyhole because of the violent metal vapor.en_UK
dc.identifier.citationMu Z, Chen X, Hu R, et al., (2019) Laser induced arc dynamics destabilization in laser-arc hybrid welding. Journal of Physics D: Applied Physics, Volume 53, Issue 7, February 2020, Article number 075202en_UK
dc.identifier.issn0022-3727
dc.identifier.urihttps://doi.org/10.1088/1361-6463/ab5758
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15599
dc.language.isoenen_UK
dc.publisherIOPen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectkeyholeen_UK
dc.subjectlaser-induced vaporen_UK
dc.subjectarc plasmaen_UK
dc.subjecthybrid weldingen_UK
dc.titleLaser induced arc dynamics destabilization in laser-arc hybrid weldingen_UK
dc.typeArticleen_UK

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