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设计了非晶合金在振动力场作用下的双杯挤压模型,利用有限元模拟和实验的方法,研究了低频振动频率、振幅等工艺参数对非晶合金摩擦行为的影响规律。首先利用水冷铜模吸铸法在真空环境下制备Zr_(55)Al_(10)Ni_5Cu_(30)大块非晶合金样品,在配备高温炉的Zwick/well材料力学性能试验机上完成双杯挤压实验;然后通过三维电子显微镜测量挤压后样品的上、下杯高度,从而计算出相应的摩擦系数值;最后利用Deform软件模拟对摩擦系数进行标定。结果表明摩擦因数随着频率的增加而减小;对振幅而言,当振动频率为0.05或0.1 Hz时,振幅的改变对摩擦因数影响不大;当振动频率为0.5或1或2 Hz时,振幅变化对摩擦因数有一定的影响,但是没有明显的规律可循。
The double-cup extrusion model of amorphous alloy under vibration force field was designed. The influence law of low frequency vibration frequency and amplitude on the friction behavior of amorphous alloy was studied by means of finite element simulation and experiment. First of all, Zr_ (55) Al_ (10) Ni_5Cu_ (30) bulk amorphous alloy samples were prepared in a vacuum environment by a water-cooled copper die-suction method and double-cup extrusion was performed on a Zwick / well material mechanical testing machine equipped with a high- Then the height of the upper cup and the lower cup of the pressed sample were measured by three-dimensional electron microscope to calculate the corresponding coefficient of friction. Finally, the friction coefficient was calibrated by Deform software. The results show that the friction coefficient decreases with the increase of the frequency. For the amplitude, when the vibration frequency is 0.05 or 0.1 Hz, the change of amplitude has little effect on the friction coefficient. When the vibration frequency is 0.5 or 1 or 2 Hz, The change of amplitude has a certain influence on the friction coefficient, but there is no obvious law to follow.