摘要
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.
Different volume fractions of 304 stainless steel capillary tubes/Zr53.5Cu26.5Ni5Al12Ag3 metallic glass composites were prepared using infiltration method. Their properties and deformation behaviors were investigated systematically. The mechanical properties were performed on materials test machine. Surfaces and fracture mor- phologies were examined using white light interferometer, X-ray 3D imaging and SEM techniques. The results show that the ductility of composites was improved. The compressive strain of composite reaches 20% when the volume fraction is 34%. The deformation involves obvious work hardening. The amount of work hardening depends on the content of tubes. The composite fails in the shear mode along 45°. The split and debonding of tubes and interfaces act as the propagation way of crack. The amount of shear bands increase as the volume fraction increases. The shear deformation of amorphous in tubes falls behind that out tubes.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第9期1087-1094,共8页
Acta Metallurgica Sinica
基金
国家重点基础研究发展计划项目2011CB606301
中国科学院"百人计划"研究项目资助~~
