W_f/Zr基非晶复合材料的弯曲断裂行为

Bending Fracture Behavior of W_f/Zr Based Amorphous Composites

采用Instron试验机和SEM研究了钨丝(Wf)增强锆基非晶复合材料的弯曲断裂行为,并与纯非晶合金进行了比较。结果表明,两种材料具有不同的断裂行为:块体非晶在最大应力处产生裂纹,并向内部呈辐射状扩展,弯曲断裂强度为2900MPa;而复合材料在界面处产生应力集中,并向周围扩展穿过钨丝断裂,弯曲断裂强度为2000MPa。

Bending fracture behaviors of W fiber reinforced Wf/Zr based amorphous matrix composites were studied by using Instron testing machine and SEM compared with that of pure amorphous alloys. The results show that the two materials have different fracture behaviors：crack origins at the maximum stress for bulk amorphous alloys, and extends to inner in the form of radiation ,the bending fracture strength is 2900MPa,while stress concentrates at the interfaces between matrix and Wf and spreads all around and across Wf, the bending fractuer strength is 2000MPa.