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探索同时具有高强度和大塑性的金属合金材料一直是材料领域追求的目标,但是由于变形机制的限制,在提高材料强度的时候往往伴随着塑性的损失。这一趋势随着材料晶粒尺寸的减小变得愈加明显。当金属合金达到结构长程无序的非晶状态时,在室温下,其强度远远高于同成分的晶态金属合金,但是其塑性变形能力几乎完全丧失。其主要原因是非晶合金没有位错等缺陷,在变形过程中主要
Exploring metal alloy materials with both high strength and plasticity has always been a goal in the field of materials, but due to the limitation of the deformation mechanism, the plasticity is often lost when the material strength is increased. This trend becomes more pronounced as the grain size of the material decreases. When the metal alloy reaches the amorphous structure with long and disorder structure, its strength is much higher than that of crystalline metal alloy with the same composition at room temperature, but its plastic deformation ability is almost completely lost. The main reason is that amorphous alloys have no dislocations and other defects, mainly in the deformation process