'Fisheye' formation in hydrogen charged low alloy cast steel containing porosity

The aim of the proposal is to investigate in situ the effect of hydrogen on the plasticity of industrially relevant metals. We will focus on studying the microstructure related effects of H-charging (i.e. local plasticity modification by cavities due to external deformation in steels). Porosity – left in the material during production – act as hydrogen traps, that alter locally the brittleness of the material. Crack initiation and propagation, grain orientation evolution, and brittle-to-ductile (BDT) transition coupled with the H-modified mechanical behaviour will be monitored during the proposed experiment.