J. Phys. IV France 04 (1994) C8-453-C8-458
Experimental study on the formation of shear bands and effect of microstructure in Al-2124/SiCp composites under dynamic compressionZ. Ling1, L. Luo2 and B. Dodd2
1 LNM, Institute of Mechanics, Th e Chinese Academy of Sciences, Beijing 100080, China
2 Department of Engineering, University of Reading, Reading RG6 2AY, U.K.
Al-2124 alloy reinforced with 17% vol. SiC particles with three sizes 3, 13, 37µm (MMCs) were tested under impact compression using a Split Hopkinson Pressure Bar(SHPB) system. Microexaminations of tested samples revealed microscopic characteristics of the formation of shear bands occurring in the MMCs. As a comparison, the matrix material, Al-2124 alloy was also tested. Shear bands formed more readily in Al-2124/SiCp reinforced with 3µm particles than in Al-2124 alloy and the alloy reinforced with 13 or 37µm SiC particles. The relations between microstructural distributions, spacing of SiC particles and formation of shear bands have been analysed.
© EDP Sciences 1994