Micro and nanohardness testing of laser welds

0436152 - FZÚ 2015 RIV RO eng J - Článek v odborném periodiku
Šebestová, H. - Čtvrtlík, Radim - Chmelíčková, H. - Tomáštík, J.
Micro and nanohardness testing of laser welds.
Romanian Academy. Proceedings. Series A. Roč. 15, č. 3 (2014), s. 247-253. ISSN 1454-9069
Grant CEP: GA TA ČR TA01010517
Institucionální podpora: RVO:68378271
Klíčová slova: Vickers microhardness * depth sensing indentation * laser welding
Kód oboru RIV: JP - Průmyslové procesy a zpracování
Impakt faktor: 1.658, rok: 2014

Local mechanical properties of pulsed Nd:YAG laser bead-on-plate welds on 0.6 thick AISI 304 stainless steel were investigated. Conventional Vickers micro-hardness, based on measurement of dimension of residual indent, and depth sensing nanoindentation were used. Measurements were performed on both transversal and longitudinal weld cross sections. Seam welds performed with the pulsed laser reached very inhomogeneous microstructure resulting from the principle of successive pulses landing on the material surface whereas each pulse partially overlaps and re-melts the area melted by the previous one. This led to the fluctuations in both Vickers microhardness and indentation hardness of the weld metal.
Trvalý link: http://hdl.handle.net/11104/0239945