Determinación de la energía almacenada en aleaciones deformadas por laminación mediante Difracción de Rayos X

Abstract

The study of anisotropic properties of polycrystalline materials, which are related to structural and microstructural aspects of them, have gained importance in recent times by two factors, the increase in the use of low-symmetry materials that are intrinsic anisotropic materials and the production of materials with strong microstructural effects due to micro and nano dimension of the structure. The Generalized Pole Figure, GPF, is an approach developed for this type of study, the GPF is the spatial representation of a physical property or a system descriptor anisotropic, , according to the directions on the sample space, (stereographic projection), properties such like grain size, subgrain size, lattice deformations, crystallographic texture, etc., and the particular case, the stored energy, are some examples of this methodology. This work the GPF measurement methodology was implemented, which involved the development of software to control a texture goniometer to perform -2 scans in particular positions from stereographic projection, preparation of an axial divergence slit, and the development of processing software GPF and Stored Energy Distribution Function (SEDF) determination. The developed methodology was applied to a metal alloy of Fe-50%Ni, where GPF crystallite size, shift the positions of the peaks of X-ray diffraction, stored energy, and SEDF was determined.