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Ki, Hyungson
Laser Processing & Multiphysics Systems Laboratory
Research Interests
  • Laser materials processing
  • Laser material interaction

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A study of keyhole geometry in laser welding of zinc-coated and uncoated steels using a coaxial observation method

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dc.contributor.author Kim, Jaehun ko
dc.contributor.author Oh, Sehyeok ko
dc.contributor.author Ki, Hyungson ko
dc.date.available 2015-07-27T05:03:00Z -
dc.date.created 2015-07-09 ko
dc.date.issued 2015-11 ko
dc.identifier.citation JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, v.225, pp.451 - 462 ko
dc.identifier.issn 0924-0136 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/12621 -
dc.description.abstract Experiments were conducted over a large process parameter space using a 2 kW multi-mode fiber laser, and the effect of zinc-coating on the keyhole geometry was investigated using a high-speed coaxial video camera. From the top and bottom coaxial surface images of erratic keyhole motions that were obtained from separately conducted experiments, time-averaged keyhole structures were calculated using a physics-based semi-statistical frame analysis. For uncoated steel, the keyhole bottom aperture is located mostly within the laser beam area. In this case, because there is no zinc evaporation, the bottom aperture tends to be closed to absorb enough laser energy for sustaining a keyhole. For zinc-coated steel, the keyhole is mostly open at the bottom, and the front keyhole wall is tilted so that the laser beam is located on the front keyhole wall. The keyhole tilting angle is more important for zinc-coated steel and the beam interaction area is more relevant to uncoated steel. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ELSEVIER SCIENCE SA ko
dc.title A study of keyhole geometry in laser welding of zinc-coated and uncoated steels using a coaxial observation method ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84936759016 ko
dc.identifier.wosid 000359171100047 ko
dc.type.rims ART ko
dc.description.wostc 0 *
dc.description.scopustc 0 *
dc.date.tcdate 2015-12-28 *
dc.date.scptcdate 2015-11-04 *
dc.date.scptcdate 2015-11-04 *
dc.identifier.doi 10.1016/j.jmatprotec.2015.06.029 ko
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S092401361530039X ko
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