X-ray line shifts in deformed uranium

Abstract

Abstract The line shifts for (111), (112), (113), (131) and (114) Bragg reflections have been investigated in the case of uranium deformed by cold-rolling. The Bragg maxima for different lines are found to shift towards either lower or higher values. It is shown from experiments on cold-rolled specimens subjected to etching that these peak shifts are not due to intergranular stresses. In view of low deformation stacking-fault probability the observed peak shifts are attributed to changes in d-spacing values due to change in lattice parameters of the cold-rolled uranium. The probability of point defects (lattice vacancies) aggregates introduced during cold-work, causing a ‘relaxation’ of the lattice, has also been discussed.