SiC颗粒增强6061Al基复合材料的动态拉伸性能 Ⅰ应变硬化  

DYNAMIC TENSILE DEFORMATION OFSiC_P/6061Al COMPOSITE PART 1 STRAIN HARDENING CHARACTERISTIC

作　　者：钱立和[1] 王中光[1] 小林俊郎 户田裕之 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室 [2]日本丰桥技术科学大学

出　　处：《材料研究学报》2002年第3期285-288,共4页Chinese Journal of Materials Research

基　　金：国家重点研究发展规划资助项目 G19990650

摘　　要：利用拉伸split Hopkinson bar实验装置研究了出SiCp/6061Al复合材料及其基体合金的动态拉伸性能及应变硬化行为.结果表明,与静态加载类似,在动态加载条件下,SiCp/6061Al复合材料的强度高于基体合金的强度,其断裂延伸率低于基体合金的断裂延伸率.在低应变动态拉伸时,复合材料的应变硬化指数高于Al合金材料的应变硬化指数,随着应变的增加,复合材料的应变硬化指数迅速下降,以至低于基体合金的应变硬化指数.An investigation was made on the dynamic tensile deformation and strain hardening characteristic of a SiCP/6061Al composite and its matrix alloy using tensile split Hopkinson pressure bar apparatus. It is shown that under dynamic loading condition, as in the case of static loading, the strength of the SiCP/6061Al is higher and its elongation to fracture is lower than those of 6061Al alloy. At a low strain, the dynamic tensile strain hardening exponent of the studied composite is higher than that of its matrix alloy. However, the strain hardening exponent of the composite decreases rapidly with increasing strain, and becomes lower than that of its matrix alloy at a higher strain. The deformation and damage mechanisms are discussed in terms of dislocation.

关 键 词：SIC 颗粒增强 6061Al基复合材料 动态拉伸性能 应变速率 应变硬化 碳化硅 铝 

分 类 号：TB333[一般工业技术—材料科学与工程]