SiCw/6061Al复合材料冲击破坏行为  

IMPACT FRACTURE OF SiCw/6061 Al COMPOSITES

作　　者：焦成革 姚忠凯[2] 

机构地区：[1]北京航空材料研究所,北京100095 [2]哈尔滨工业大学

出　　处：《复合材料学报》1991年第2期91-96,共6页Acta Materiae Compositae Sinica

基　　金：863资助课题

摘　　要：本文用夏比冲击试验(Instrumented Charpy Testing)与SEM断口分析研究了SiCw/6061Al复合材料的冲击破坏行为。与SiCw是混乱分布的铸态SiCw/6061Al复合材料相比,挤压变形后材料的冲击韧性明显提高。热挤压变形改善了材料的性能。研究观察发现了分层开裂的现象。本文详细讨论了SiCw/6061Al复合材料的冲击断裂方式、比较了变形前后冲击破坏方式的差异,并分析了热挤压变形后韧性提高的原因。Impact fracture behavior of SiC whisker reinforced 6061AL matal matrix composites has been studied by combining SEM fractographic analysis and instrumented charpy testing.As compared with that of isotropic SiCw/606lAl composite in which SiCw were randomly oriented,the hot-extruded composite has higher impact toughness.lt is shown that hot-extrusion improves the pr-operties of SiCw/606lAl composites.Delamination fracture phenomenon was observed. The impact fracture models of SiCw/606lAl composites were dis-cussed in detail. The impact fracture behavior of the composite after extr-usion is different from that of the as-fabricated composite. The reasons why the impact toughness was improved by extrusion of SiCw/606lAl, were ana-lysed.

关 键 词：金属基 复合材料 冲击 破坏 

分 类 号：TB331.021[一般工业技术—材料科学与工程]