论文部分内容阅读
中科院物理所汪卫华研究组发展了一种简单的非晶合金材料热循环处理工艺。该工艺将非晶合金在液氮或者液氦中浸泡几分钟,然后快速升温至室温并保持几分钟。经过数十次循环之后发现,非晶合金整体能量升高,表现为非晶合金微分扫描量热(DSC)曲线晶化前结构弛豫放热峰得到明显的增强。通过力学测试发现,热循环之后合金的硬度明显降低;通过力学实验机压缩测量,热循环之后,合金的压缩塑性增加到7%以上,且表面剪切带的数量增加。通过动态力学测试仪(DMA)
Wang Weihua Institute of Physics, Chinese Academy of Sciences has developed a simple heat treatment of amorphous alloy materials. The process immerses the amorphous alloy in liquid nitrogen or liquid helium for a few minutes and then rapidly warms to room temperature for a few minutes. After dozens of cycles, it was found that the overall energy of the amorphous alloy increased, showing a significant enhancement of the structure relaxation exothermic peak before the differential scanning calorimetry (DSC) crystallization of the amorphous alloy. The mechanical tests show that the hardness of the alloy decreases obviously after thermal cycling. Compressive plasticity increases by more than 7% and the number of surface shear bands increases after thermal cycling. Through dynamic mechanical tester (DMA)