Investigation of residual stresses and deformation mechanisms of magnesium-based composites by means of neutron diffraction and acoustic emission methods

The objective of this thesis is to study the mechanical properties of magnesium-based composite (AX41) reinforced by short Saffil fibers. Two type of samples have been investigated: fiber plane parallel respective perpendicular to the loading axis. In both case compression tests were performed in temperature range from 23řC to 200řC. Deformation test were completed by acoustic emission and neutron diffraction measurement. Both methods provide information about the ongoing deformation mechanisms. Microstructure of deformed sample was investigated by SEM and EBSD methods in order to confirm the ND and AE results. The internal strain field in the material was predicted with numerical FEM and compared with the observed experimental values