Dr Brent Heuser - Hydrogen trapping at dislocations in deformed Pd at low temps
17 Jan 2012
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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 another example. 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.

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