Functionally Graded Materials, Anti-penetration Performance Test

The study of Metal Matrix Composites (MMCs) is a new material subject. Because of the excellent behavior of MMCs, it attracts many researchers' attention. Much work has been done to develop the MMCs, and many MMCs with different reinforcement and volume fraction were developed. The Functionally Graded Material (FGM) becomes more and more important since the excellent resistance of penetration.This paper is mainly about the mechanical behavior of Al/SiCp MMCs under high strain rate and the penetration performance of FGM.In this paper, the Split Hopkinson Pressure Bar (SHPB) was used to study the compression mechanical behavior of Al/SiCp MMCs under the high strain rate. The samples are made from Al/SiCp MMCs which prepared by vacuum hot-pressing sintering processing and the sample size is Φ5*5. The volume fraction of SiC are 5%, 10%, 15%, 20%, 25% and 30%. The stress-strain curves of six kinds of volume fraction of Al/SiCp were obtained. Compared with the results of quasi-static, it was found that the flow stress evidently increased under the high strain rate. With the increase of volume fraction of SiC particles, the flow stress of composites increases. From the compare of the experiment result and the analysis result, the constitute equation of MMCs is given.The penetration experimental equipments and technologies are also introduced. From the experimental data and result, it is found that the penetrate resistance of FGM plate is much better than pure aluminium plate.