论文部分内容阅读
采用渗流法成功制备出不同体积分数的304不锈钢毛细管/Zr53.5Cu26.5Ni5Al12Ag3块状非晶复合材料,分析了该复合材料的性能和变形行为.利用万能力学试验机进行性能测试,利用白光干涉轮廓测量仪、X射线三维成像和SEM观察样品表面及断口形貌.结果表明:复合材料的塑性得到显著改善,其中毛细管体积分数为34%时,复合材料的压缩应变可达约20%,同时伴有明显的加工硬化现象,其加工硬化量与毛细管含量有关.复合材料以近45°的剪切方式断裂,表面较为平坦,毛细管撕裂与界面脱粘形成裂纹扩展路径.剪切带的数量随毛细管体积分数增加而增加,毛细管包裹的非晶基体发生剪切变形滞后于毛细管外部的基体.
The porous stainless steel capillary / Zr53.5Cu26.5Ni5Al12Ag3 bulk amorphous composite with different volume fractions was successfully prepared by the seepage method, and the properties and deformation behavior of the composites were analyzed.The performance of the composites was tested by universal mechanical testing machine, The results show that the plasticity of the composites is significantly improved, the compressive strain of the composites reaches about 20% when the volume fraction of the capillaries is 34% There is a clear phenomenon of work hardening, the amount of work hardening and capillary content related to the composite material to nearly 45 ° shear fracture, the surface is relatively flat, the capillary tear and the interface debonding crack propagation path to form the number of shear bands with the capillary The increase of volume fraction increases the shear deformation of the capillary-wrapped amorphous matrix lagging behind the outer matrix of the capillary.