高温变形对非晶材料室温塑性的影响

he nanocrystalline/amorphous matrix composites was obtained by isothermal compression at high temperatures with a low strain rate. To study the influence of high temperature deformation on the fracture behavior and room temperature plasticity, compression tests with a constant strain rate of 1×10-4s-1 were applied to the deformed samples. Fracture features of as-cast alloy and deformed samples were analyzed using scanning electron microscopy. Compared with the as-cast alloy, the room temperature plasticity of deformed sample is not destroyed both in the range of 370–395 ℃ at 1×10-3s-1, and deteriorated at higher temperatures.