The structure and properties of an Mg-Zn-Ca alloy processed by high-pressure torsion (HPT) are investigated. Microstructure is studied by transmission electron microscopy, scanning electron microscopy, and X-ray diffraction. An enhanced microhardness of 990MPa is observed in the HPT-processed samples due to an uniform microstructure with a grain size of 150 nm. After additional annealing at 200 degrees C, the ultrafine-grained alloy demonstrates an ultimate tensile strength of 270 MPa with a ductility of 9%.
展开▼
