| Abstract Scope |
Martensite is a key constituent for developing high-performance steels with excellent combination of strength and toughness. Fresh martensite, formed through fast cooling of the high temperature phase austenite, is normally brittle, and a tempering treatment is usually needed to induce sufficient ductility and toughness. However, the strength is decreased by tempering unless the steel is alloyed with precipitation-forming elements, to stimulate clusters and nano-particles during the tempering process. The project has been working on the effect of 12T magnetic on the Cu clustering mechanism.
Atom Probe Tomography (APT), with the capability of 3D atom-by-atom mapping, allows us to quantitatively characterize the precipitation kinetics, i.e. the evolution of chemistry, size, volume fraction, number density of precipitates with time during the tempering treatment.In this talk, we will show how the APT, have been supporting the development of precipitation kinetics modelling of the nucleation, growth and coarsening under high magnetic field. |