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研究了Zr基非晶合金在过冷过程中的拉伸变形行为。结果表明,非晶合金在加热温度和应变速率分别为400℃和0.001/s条件下具有良好的塑性。随着变形量的增加,非晶合金经历了弹性变形和塑性变形阶段,最终在形变量达到243.3%时发生了颈缩现象。局部区域的塑性与晶化作用有关,原子可以沿着纳米晶界形成的通道移动,非晶体的变形会因为原子运动的加剧而变得更为容易,使非晶基体自由体积减小,有利于形成更多的纳米晶体,从而造成局部变形不均匀。
The tensile deformation behavior of Zr-based amorphous alloys during overcooling was investigated. The results show that the amorphous alloy has good plasticity under the conditions of heating temperature and strain rate of 400 ℃ and 0.001 / s, respectively. With the increase of the deformation, the amorphous alloy undergoes elastic deformation and plastic deformation, and finally the necking occurs when the deformation reaches 243.3%. The plasticity of the local region is related to the crystallization. The atoms can move along the channel formed by the nanocrystalline boundary. The deformation of the amorphous body becomes easier due to the intensification of the atomic motion, which reduces the free volume of the amorphous matrix, which is in favor of The formation of more nanocrystals, resulting in local deformation is not uniform.