The hydrogen-dislocation trapping
interaction is an example of solute-defect interaction that is relevant
in the mechanical response of metals and alloys to applied stress. The
Portevin-LeChatelier effect is an example in systems that exhibit
serrated yielding due to solute atoms impeding dislocation mobility.
Hydrogen enhanced localized plasticity in Fe and Ni based alloys is
We have applied neutron scattering techniques and advanced computational
methods to study the hydrogen dislocation trapping interaction in
deformed palladium, a metal that has served as a test-bed system for
hydrogen behavior for several decades.