This study presents a comprehensive scale-bridging characterization approach to investigate acicular ferrite nucleation in electron beam welded S355 ML steel, demonstrating the critical role of titanium oxide particles in promoting fracture-resistant microstructures for offshore wind monopile applications. Using a multi-technique methodology spanning light microscopy, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and transmission Kikuchi diffraction (TKD), the researchers identified and analyzed particles that serve as nucleation sites for acicular ferrite formation. This entry won the prestigious 2024 Jacquet-Lucas Award for Excellence in Metallography at the International Metallographic Contest held during IMAT in Cleveland, October 2024.

acicular ferrite, electron backscatter diffraction, electron beam welding, energy dispersive X-ray spectroscopy, structural steel, titanium oxide, metallography, nucleation, scanning electron microscopy, transmission electron microscopy
This content is only available as a PDF.
Copyright © ASM International® 2025
2025
ASM International
Topics
Structural steel Metallography Scanning electron microscopy Transmission electron microscopy Electron beam welding Energy dispersive X-ray spectroscopy Electron backscatter diffraction Ferrite Nucleation
You do not currently have access to this content.