纳米压痕法研究Si对Mg60Cu30Y10非晶合金的影响

Effects of Silicon on Mg60Cu30Y10 Amorphous Alloys Studied by a Nanoindentation Method

摘要:

利用纳米探针仪研究硅元素对Mg60Cu30Y10非晶合金的载荷-位移曲线和力学性能的影响。结果显示，Mg60Cu30-xY10Six非晶合金载荷-位移曲线上不连续锯齿状台阶对应其剪切带的形成和扩展。随着硅元素含量的增加，相同加载速率下，载荷-位移曲线上的台阶逐渐减少，直至消失。随着加载速率和应变速率的不断增加，非晶合金Mg60Cu30-xY10Six载荷-位移曲线上的锯齿状台阶逐渐消失。非晶合金Mg60Cu30-xY10Six的力学性能不是简单地随着组元的含量、数量等参数的增大而提高

Abstract:

Effects of silicon element on the load-displacement curves and the mechanical properties of Mg60Cu30Y10 amorphous alloys were investigated using nano indenter II. Results show that the load-displacement curves of Mg60Cu30-xY10Six amorphous alloys exhibit discontinuous serrations during nanoindentation, which corresponds to the formation and propagation of individual shear bands. And the loading curves become smoother and smoother until the serrations disappear with increasing of the silicon content. And the serrations of Mg60Cu30-xY10Six bulk amorphous alloys disappear gradually with the increasing of loading rates and strain rates. However, the mechanical properties of Mg60Cu30-xY10Six bulk amorphous alloys are not improved determinately with increasing of the component content and quantity