Mechanical properties study of particles reinforced aluminum matrix composites by micro-indentation experiments  

作　　者：Yuan Zhanwei Li Fuguo Zhang Peng Chen Bo Xue Fengmei 

机构地区：[1]State Key Laboratory of Solidification Processing, Northwestern Polytechnical University

出　　处：《Chinese Journal of Aeronautics》2014年第2期397-406,共10页中国航空学报（英文版）

基　　金：the support received from the National Natural Science Foundation of China (No. 51275414);the Aeronautical Science Foundation of China (No. 2011ZE53059)

摘　　要：By using instrumental micro-indentation technique, the microhardness and Young＇s modulus of SiC particles reinforced aluminum matrix composites were investigated with micro- compression-tester （MCT）. The micro-indentation experiments were performed with different max- imum loads, and with three loading speeds of 2.231, 4.462 and 19.368 mN/s respectively. During the investigation, matrix, particle and interface were tested by micro-indentation experiments. The results exhibit that the variations of Young＇s modulus and microhardness at particle, matrix and interface were highly dependent on the loading conditions （maximum load and loading speed） and the locations of indentation. Micro-indentation hardness experiments of matrix show the indentation size effects, i.e. the indentation hardness decreased with the indentation depth increas- ing. During the analysis, the effect of loading conditions on Young＇s modulus and microhardness were explained. Besides, the elastic-plastic properties of matrix were analyzed. The validity of cal- culated results was identified by finite element simulation. And the simulation results had been pre- liminarily analyzed from statistical aspect.By using instrumental micro-indentation technique, the microhardness and Young＇s modulus of SiC particles reinforced aluminum matrix composites were investigated with micro- compression-tester （MCT）. The micro-indentation experiments were performed with different max- imum loads, and with three loading speeds of 2.231, 4.462 and 19.368 mN/s respectively. During the investigation, matrix, particle and interface were tested by micro-indentation experiments. The results exhibit that the variations of Young＇s modulus and microhardness at particle, matrix and interface were highly dependent on the loading conditions （maximum load and loading speed） and the locations of indentation. Micro-indentation hardness experiments of matrix show the indentation size effects, i.e. the indentation hardness decreased with the indentation depth increas- ing. During the analysis, the effect of loading conditions on Young＇s modulus and microhardness were explained. Besides, the elastic-plastic properties of matrix were analyzed. The validity of cal- culated results was identified by finite element simulation. And the simulation results had been pre- liminarily analyzed from statistical aspect.

关 键 词：Aluminum matrix compos-ites FEM MICROHARDNESS MICRO-INDENTATION Young＇s modulus 

分 类 号：TB333[一般工业技术—材料科学与工程]