摘要
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 the impact of vibration force field was designed. The finite element simulation and experiment were used to study the influence laws of frequency, amplitude and other process parameters on the friction be- havior of amorphous alloys. First, the samples of Zr55 All0 Nis Cu30 bulk amorphous alloy were prepared by water-cooled copper mold casting in vacuum, and the double cup extrusion was carried out at 450 ℃ by using Zwich/well materials testing machine equipped with air fur- nace. Then the heights of the upper and lower cup were measured by three dimensional electron microscope and the corresponding friction coefficients were calculated. Finally, the friction coefficient calibration was carried out by using Deform software. The results show that the friction coefficient decreases with the increase of frequency. For the amplitude, when the vibration frequency is 0.05 or 0. 1 Hz, the amplitude change has little influence on the friction coefficient. When the vibration frequency is O. 5 or 1 or 2 Hz, the amplitude change has certain influence on the friction coefficient, but there is no clear rule to follow.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2017年第3期203-208,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51275364)
关键词
非晶合金
微成形
振动载荷
摩擦
双杯挤压
amorphous alloy
micro-forming
vibration load
friction
double cup extrusion
