Features of the keyhole evolution during deep penetration of metals by laser radiation
Seidgazov R. D.1, Mirzade F. Kh. 1
1Institute on Laser and Information Technologies—Branch of the Federal Scientific Research Center “Crystallography and Photonics”, Russian Academy of Sciences, Shatura, Moscow region, Russia
Email: seidgazov@mail.ru, fmirzade@rambler.ru

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The paper presents the results of fast detection of the keyhole formation in titanium under point exposure to laser radiation. The fact has been established that the keyhole evolution ends with a collapse even before the cessation of the action (switching off) of the continuous laser radiation. Keywords: deep penetration, keyhole, collapse, laser radiation.
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