SiC颗粒增强6061Al基复合材料的动态拉伸性能 Ⅱ应变速率效应  

DYNAMIC TENSILE DEFORMATION OFSiC_P/6061Al COMPOSITE PART 2 STRAIN RATE SENSITIVITY

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289-295,共7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：用拉伸split Hopkinson bar实验装置进行了SiCp/6061Al复合材料及其基体合金的动态拉伸实验,研究了材料的应变速率敏感性.结果表明,SiCp/6061Al复合材料及其基体合金均具有明显的应变速率效应,且复合材料的应变速率敏感性高于基体合金的应变速率敏感性.根据位错机制对此进行了解释.A dynamic tensile experiment for a SiCP/6061Al composite and its matrix alloy in an over-aged state was performed using split Hopkinson bar apparatus, and a study was made on the strain rate sensitivity of their tensile properties. Results show that SiCP/6061Al composite and its matrix alloy exhibit and obvious strain rate effect of strength and fracture stain, and the strain rate sensitivity of the SiCP/6061Al composite is higher than that of 6061Al alloy. The high strain rate sensitivity of the SiCP/6061Al composite is considered to be originated from the high dislocation accumulation rate during dynamic deformation and the constraint of SiC particles on the surrounding matrix, which dramatically enhances strain rate of the matrix.

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

分 类 号：TB333[一般工业技术—材料科学与工程]