Correlation between Microstructure and Hydrogen Storage Properties of Nanocrystalline Magnesium Subjected to High-Pressure Torsion

摘要

High-pressure torsion was performed on commercial magnesium disks under uniaxial compression and simultaneously shear straining for different number of turns. Microstructural evolution during the severe plastic deformation process has been investigated by X-ray diffraction line profile analysis. Complementary hydrogen absorption experiments in a Sieverts'-type apparatus indicated that hydrogen storage and the microstructural parameters exhibit correlation.