IN THE PROCESS OF APPLYING HOMOGENIZATION TO POLYCRYSTALLINE MATERIALS

Abstract

Composite mechanics can be applied to polycrystalline materials if each crystal is considered a separate phase. In fact, this approximation has already been reported in the literature. However, the large number of structural factors makes this task face several difficulties. It is necessary to consider the effects of grain size shape and size distribution, porosity shape and size distribution, and crystal orientation distribution on the material properties. Grain boundaries and pore surfaces are expected to modify material properties in some cases. Therefore, investigating the influence of Grain boundary misorientation distribution is a topic that deserves attention. In addition to that, grain boundaries can present segregation and contamination, becoming a region with different properties from the original crystal. Considering all these structural variables when applying homogenization techniques to calculate effective properties is most probably a cumbersome task. It is necessary to identify the structural factors to be considered for applying homogenization techniques to calculate effective properties. An analysis of this picture is presented, and some specific cases are described.