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Defocusing Techniques for Multi-pass Laser Welding of Austenitic Stainless Steel

Autor: Karhu, Miikka, Kujanpää, Veli

Publikováno v: In Physics Procedia 2015 78:53-64

Controlling root penetration in electron beam welding by a through-current feedback.

Autor: Karhu, Miikka, Kujanpää, Veli

Publikováno v: Welding in the World; Mar2023, Vol. 67 Issue 3, p777-791, 15p

Effect of leading and trailing torch configuration on mixing and fluid behavior of laser-gas metal arc hybrid welding

Autor: Kujanpaa Veli, Karhu Miikka, Na Suck-joo, Sohail Muhammad, Han Sang-Woo

Publikováno v: Sohail, M, Karhu, M, Na, S-J, Han, S-W & Kujanpää, V 2017, ' Effect of leading and trailing torch configuration on mixing and fluid behavior of laser-gas metal arc hybrid welding ', Journal of Laser Applications, vol. 29, no. 4, 042009 . https://doi.org/10.2351/1.5008304

The paper introduces the results of mixing and fluid flow studies for full penetration laser-gas metal arc (GMA) hybrid welding with GMA leading and trailing torch configuration. The material used was austenitic stainless steel with the thickness of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c1145f632ca51366f8fa0263250e2eb
http://juuli.fi/Record/0284334117

Flow and bead formation characteristics in high power laser welding at different welding positions

Autor: Na, Suck-Joo, Han, Sang-Woo, Sohail, Muhammad, Zhang, Linjie, Gumenyuk, Andrey, Rethmeier, Michael, Karhu, Miikka, Kujanpää, Veli

Publikováno v: Na, S-J, Han, S-W, Sohail, M, Zhang, L, Gumenyuk, A, Rethmeier, M, Karhu, M & Kujanpää, V 2015, Flow and bead formation characteristics in high power laser welding at different welding positions . in Proceedings of the Lasers in Manufacturing Conference 2015 . Wissenschaftlische Gesellscaft Lasertechnik e.V., Lasers in Manufacturing 2015, LiM 2015, Munich, Bavaria, Germany, 22/06/15 . < https://www.wlt.de/lim/Proceedings/Stick/PDF/Contribution232_final.pdf >

The numerical simulations of high power laser keyhole welding at different welding positions are performed by using Volume-Of-Fluid (VOF) method. The main material is SS400. The multi-physics phenomenon is considered using several models, such as the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=355e65625b88::f98652a24c550ffdae37e1994a757811
https://cris.vtt.fi/en/publications/5bc662d3-56b9-470b-b66c-59d4c92f33fc