Microstresses induced by hydrogenation and plastic defomiation in palladium and its alloys with copper, platinum, hafnium, and samarium

The positions of maxima in the X-ray diffraction patterns were measured and the lattice parameters $a$ were calculated for pure palladium and its alloys with Cu, Pt, Hf, and Sm. Microstresses developed in the sample surface subjected to plastic deformation by polishing increase the lattice parameter of the cubic crystal, the effect being dependent on the crystallographic orientation of the surface. Saturation of the samples with hydrogen decreases the level of microstresses and may even change their sign.