【摘要】 对称循环载荷作用下Zr55Al10Ni5Cu30块状非晶合金的循环疲劳特性的测试表明,完全非晶试样在常应力幅循环载荷作用下出现了轻微的循环软化现象.非晶基体中析出的细小淬态相使试样出现了更加明显的循环软化现象,而且细小淬态相在循环载荷作用下有从非晶基体向外突出的趋势,在淬态相与非晶基体的界面处还出现了微裂纹.但是带有粗大晶相块状非晶试样在循环形变过程中循环软化现象又变得不是很明显.更多还原

【Abstract】 The Zr55Al10Ni5Cu30 bulk amorphous alloy and specimens with quenched-in crystallites were prepared by copper mold casting method, to study the symmetrically cyclic deformation behavior of bulk amorphous alloy. Under symmetrically cyclic loading, the amorphous specimen and the specimen with larger quenched-in crystallites softened slightly. However, a gradual cyclic softening occurred for the amorphous specimen with fine quenched-in crystallites. The fine crystallites seemed to protrude from the amorphous matrix and some bulges appeared on the surface of specimen with fine crystallites under cyclic loading. The presence of crystallites in the amorphous matrix lowered the fatigue properties of material.更多还原