Understanding irradiation assisted hydrogen enhanced localized plasticity using in situ BCDI

This proposal describes the use of BCDI at the ID01 beamline to understand the hydrogen embrittlement localized plasticity (HELP) mechanism in Ni and Ni-Cr model single crystals. Three-dimensional coherent X-ray diffraction will be used to image the hydrogen-induced strain, and to quantify the time dependent structural evolution induced during hydrogen charging. Comparison between pristine and nano-indented crystals of similar morphology will help elucidate the importance of defect nucleation during hydrogen embrittlement.