摘要
The paper reports that the shear-band spacing can be controlled by the Bridgman solidification technique for a model alloy of Zr38.3Ti32.9Nb7.3Cu6.2Be15.3.The volume percent of the glass phase is almost independent of the withdrawal velocity.The shear-band spacing reaches a minimum of about 3 μm with withdrawal velocity of 0.8 mm/s.The optimized mechanical properties,such as the fracture strength of ～2100 MPa and plastic strain of ～19%,have been obtained.The large plastic deformation is due to the dislocation slips in the dendrite phase and shear-band propagations in the glass phase.
The paper reports that the shear-band spacing can be controlled by the Bridgman solidification technique for a model alloy of Zr38.3Ti32.9Nb7.3Cu6.2Be15.3. The volume percent of the glass phase is almost independent of the withdrawal velocity. The shear-band spacing reaches a minimum of about 3 μm with withdrawal velocity of 0.8 mm/s. The optimized mechanical properties, such as the fracture strength of ～2100 MPa and plastic strain of ～19%, have been obtained. The large plastic deformation is due to the dislocation slips in the dendrite phase and shear-band propagations in the glass phase.
