Print Email Facebook Twitter Microstructure Study of Pulsed Laser Beam Welded Oxide Dispersion-Strengthened (ODS) Eurofer Steel Title Microstructure Study of Pulsed Laser Beam Welded Oxide Dispersion-Strengthened (ODS) Eurofer Steel Author Fu, J. (TU Delft Team Marcel Hermans; FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research) Richardson, I.M. (TU Delft Team Marcel Hermans) Hermans, M.J.M. (TU Delft Team Marcel Hermans) Date 2021 Abstract Oxide dispersion-strengthened (ODS) Eurofer steel was laser welded using a short pulse duration and a designed pattern to minimise local heat accumulation. With a laser power of 2500 W and a duration of more than 3 ms, a full penetration can be obtained in a 1 mm thick plate. Material loss was observed in the fusion zone due to metal vaporisation, which can be fully compensated by the use of filler material. The solidified fusion zone consists of an elongated dual phase microstructure with a bimodal grain size distribution. Nano-oxide particles were found to be dispersed in the steel. Electron backscattered diffraction (EBSD) analysis shows that the microstructure of the heat-treated joint is recovered with substantially unaltered grain size and lower misorientations in different regions. The experimental results indicate that joints with fine grains and dispersed nano-oxide particles can be achieved via pulsed laser beam welding using filler material and post heat treatment. Subject oxide dispersion strengthened steelODS Euroferlaser weldingmicrostructureEBSD To reference this document use: http://resolver.tudelft.nl/uuid:178248b3-43e4-457a-b015-9c1378d8f0a2 DOI https://doi.org/10.3390/mi12060629 ISSN 2072-666X Source Micromachines, 12 (6) Part of collection Institutional Repository Document type journal article Rights © 2021 J. Fu, I.M. Richardson, M.J.M. Hermans Files PDF micromachines_12_00629.pdf 5.01 MB Close viewer /islandora/object/uuid:178248b3-43e4-457a-b015-9c1378d8f0a2/datastream/OBJ/view