Stress-assisted diffusion of hydrogen atoms in anisotropic polycrystals: visit II

We have recently conducted an experiment at ID-11, to measure 3D stress and rotation fields around zirconium hydrides (MA-4484). With the use of nanoscope and extremely brilliant X-ray we indexed different phases of zirconium hydrides within zirconium matrix and we were able to measure lattice parameters and orientations for the zirconium matrix. Such data will provide significant information regarding stress development around various forms of zirconium hydrides that form during operation of nuclear reactors. During this experiment we conducted measurements at room temperature, and for the first time, we increased the temperature to 400 °C to partially dissolve the hydride phase. This was done for one of the specimens, however due to lack of beam time, it was not possible to run the same experiment on the second specimen where the hydride phase is located at the interface of three grains. The scope of this proposal is to request a 2-day beamtime to complete experiment MA-4484.