利用分离式Hopkinson压杆实验装置(SHPB)研究Zr38Ti17Cu10.5Co12Be22.5大块非晶合金的室温动态压缩断裂行为,应变率控制在～102 s-1.该大块非晶在动态压缩条件下表现出完全弹性变形,在断裂之前没有明显的塑性变形.试样沿与加载方向成～42°的方向剪切断裂,剪切面非常粗糙.利用扫描电子显微镜(SEM)研究剪切带的形核和扩展.高倍下在剪切面上观察到明显的微剪切带和微裂纹,表明在动态加载条件下,剪切带形核之后立即促发形成微剪切带或者微裂纹.此外,在剪切面观察到的熔融带表明在动态断裂过程中,绝热也起到了很重要的作用.
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