挤压角度对AgCuO复合材料组织演变的影响

Effect of Extrusion Angle on Microstructure Evolution of AgCuO Composites

研究了挤压角度对AgCuO复合材料组织变化的影响。通过试验结果与有限元模拟结果进行对比,进一步证实有限元模拟的真实性以及试验结果的准确性。结果表明:当两个立方CuO位置较近且周围没有单斜CuO时,立方CuO都从多边形变为直线形纤维;而当单斜与立方CuO位置较近时,立方CuO由多边形变为弯曲的纤维状,单斜CuO也发生了部分变形。此外,随着模具角度的增大,试样表面附近的CuO颗粒分散性逐渐增强,立方CuO纤维不断变细变长,而且立方CuO颗粒纤维化现象沿径向向内逐渐减少。试样所受应力不断增加,且最大应力出现在定径带入口附近;变形区作用范围不断减小,但应力却不断增加。

In this paper,the effect of extrusion angle on the microstructure of AgCuO composites was studied.The results obtained from the experiments were compared with the simulation results,the authenticity of the finite element simulation and the accuracy of the experimental results were confirmed.Results showed that when the position of the two cubic CuO was near and there was no single CuO,the cubic CuO was deformed into a straight line from the polygon.When the position of the single and the cubic CuO was relatively close,the cubic CuO was deformed by the polygon as a curved fiber,and the single CuO was partially deformed.In addition,with the increase of die angle,the dispersion of CuO particles near the surface of the sample was gradually enhanced,and the cubic CuO fibers became finer and longer,and the phenomenon of CuO particles in the cubic gradually decreased along the radial direction.The stress of the sample was increasing,and the maximum stress appeared in the vicinity of the fixed diameter zone.The scope of deformation was decreased,but the stress was increasing.