Print Email Facebook Twitter Laser Welding of Zinc Coated Steel Without a Pre-set gap Title Laser Welding of Zinc Coated Steel Without a Pre-set gap Author Pan, Y. Contributor Richardson, I. (promotor) Faculty Mechanical, Maritime and Materials Engineering Department Materials Science & Engineering Date 2011-12-22 Abstract The major problem during laser welding of zinc coated sheet steel in an overlap configuration is the zinc vapour produced at the interface between two sheets. The vapour tends to evacuate through the keyhole and melt pool, particularly when no gap is present between the overlapped sheets. This causes process instabilities and results in the formation of pores and severe undercut. The aim of this work is to build an understanding of the material behaviour, particularly the zinc behaviour when welding zinc coated steels in overlap configuration without a pre-set gap. The interaction between zinc vapour and welded materials was investigated mainly by experimental approaches. Questions concerning when and how stable welds can be obtained are answered by introducing a mechanism describing the dynamic balance between the zinc vapour, the keyhole and the weld pool. Subject laser weldingKeyholeZinc coated steel To reference this document use: http://resolver.tudelft.nl/uuid:3431e585-db3f-41c3-9bd8-90f215c0e129 ISBN 9789077172643 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2011 Pan, Y. Files PDF YPan_Thesis2.pdf 15.33 MB PDF Propositions_Final.pdf 12.04 KB Close viewer /islandora/object/uuid:3431e585-db3f-41c3-9bd8-90f215c0e129/datastream/OBJ1/view