Dr Mark (Tom) Lapington is a Postdoctoral Research Assistant looking at the combined effect of irradiation and liquid metal corrosion on steels used in liquid lead (Pb) and lead-bismuth eutectic (LBE) cooled fast reactors. These synergistic irradiation-corrosion effects are being studied in collaboration with MIT, using their new facility to simultaneously expose a range of steels to Pb/LBE and proton irradiation. Tom’s role is to characterise the chemistry and microstructure of these exposed steels from the macroscopic to the atomic scale, using X-ray diffraction and electron-backscatter diffraction (EBSD) to measure lattice orientation and strain, transmission electron microscopy (TEM) to characterise defect content and chemical composition, and atomprobe tomography (APT) to examine atomic scale chemical composition.
• Development and optimisation of high temperature alloys, such as nickel superalloys and titanium for aerospace applications.
• Improving damage tolerance by understanding the mechanisms behind oxidation, corrosion, fatigue, creep etc
• 3D visualisation using tomographical techniques: X-ray CT and Atom Probe Tomography
• Development of complementary FIB-based sample preparation techniques integrating Electron Backscatter Diffraction (EBSD), Energy Dispersive X-ray Spectroscopy (EDX) and Transmission Kikuchi Diffraction (TKD).