Physical modelling of plastic deformation rates in martensitic steels at various temperatures and stress loads ? current status, potential, and future developments
Sprache des Vortragstitels:
Englisch
Original Tagungtitel:
THERMEC'2023 - International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS, Processing, Fabrication, Properties, Applications
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
In this work, we present the current status of our microstructural-based physical model for plastic deformation rates of martensitic steels. Currently, the model is applied within the creep regime and is able to predict the evolution of the microstructure (precipitates, dislocations, subgrain boundaries) and according deformation/creep rates. The model intrinsically identifies and weights the relevant microstructural mechanisms and reproduces creep curves, the material?s lifetime and time-to-rupture diagrams. However, the microstructural interactions in the model are not necessarily restricted to high temperatures and intermediate stresses. We analyze, to what extent the model can be applied and extended to higher and lower stresses for applications such as hot deformation or microstructural recovery. The ultimate goal, applying the very same (physically based) model for the prediction of down-to-room-temperature stress-strain curves and up to creep and hot deformation is not reached yet, but we outline the steps towards this goal and identify the remaining missing links.