fig7
From: Neutron imaging quantifying hydrogen diffusion and distribution in metallic materials - a review
Figure 7. Neutron images of steels: (A) neutron images of hydrogenous and hydrogen-free steels[75], (B) Hydrogen concentration change with time and temperature[75], (C) hydrogen in cracks before and after heat treatment[73], (D) 3D tomography of martensitic tensile sample (hydrogen in red)[79], (E) different stages of ductile crack propagation[72].
