CAJ | 학술논문

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.
재703K대Zr55Al10Ni5Cu30대괴비정합금진행불동제압속도적등온제압실험,Zr55Al10Ni5Cu30대괴비정합금적고온본구모형용일충간단적확전지수모형래묘술,병장해본구모형대입유한원연건모의제압과정:재제압은정계단,모의결과여실험결과비상문합;재불동제압속도하,Zr55Al10Ni5Cu30대괴비정합금미발생명현정화,단제압시양적과랭액상구간수제압시간적증가이감소.
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.