在703K对Zr55Al10Ni5Cu30大块非晶合金进行不同挤压速度的等温挤压实验,Zr55Al10Ni5Cu30大块非晶合金的高温本构模型用一种简单的扩展指数模型来描述,并将该本构模型代入有限元软件模拟挤压过程:在挤压稳定阶段,模拟结果与实验结果非常吻合;在不同挤压速度下,Zr55Al10Ni5Cu30大块非晶合金未发生明显晶化,但挤压试样的过冷液相区间随挤压时间的增加而减小.
Isothermal extrusion process of Zr55Cu3oAl10Ni5 bulk metallic glass (BMG) has been performed at 703 K at various extrusion velocities.A simple stretched exponential function has been developed to describe the rheological properties of Zr55Cu30Al10Ni5 BMG and implemented into the finite element code to simulate the extrusion process.The simulated results are concordant with the experimental curve during the steady-state extrusion process.The extrusion at different velocities does not induce the perceptible crystallization.The supercooled liquid state (SCL) region △T of the extruded samples is reduced with the increase of the extrusion time.
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