| With the increasing demand for lightweight armor in the military field,Ti-Al3Ti laminated composites have attracted much attention in the field of armor protection due to their low density,high hardness,high modulus and high specific strength.Up to now,the preparation process,material composition and microstructure of Ti-Al3Ti laminated composites have been widely studied,but their effects on anti-penetration performance of the composites have been not clear.In this paper,the development,application and research state of Ti-Al3Ti laminated composites in the field of armor protection were firstly summarized.Then,basing on the ballistic penetration test and microstructure characterization technology,the finite element simulation method was used to focus on the impacts of the microstructure characteristics of Ti-Al3Ti laminated composites on their anti-penetration performance and mechanism from the following aspects:1?By using optical and electron microscopes,the microstructure characteristics of Ti-Al3Ti laminated composites were analysed quantitatively.Then,the finite element models contained different microstructure information were established according to different microstructures.Finally,the results of simulation were validated according to the actual ballistic experiment,and the finite element simulation method which can accurately describe the anti-penetration behavior of Ti-Al3Ti laminated composites was obtained.2?By using the finite element simulation method,the effects of ductile Al on the anti-penetration process,failure mode and energy change of Ti-Al3Ti laminated composites were studied when the initial velocity of the projectile was 400 m/s and 800 m/s respectively.Results showed that when the initial velocity of the projectile was different,the impacts of ductile Al on the anti-penetration and mechanism of the material had a large difference.3?The effects of the tunnel cracks and the kirkendall voids that caused by different preparation process on the anti-penetration performance and mechanism of Ti-Al3Ti laminated composites were studied using finite element simulation method.The results showed that the tunnel cracks and the kirkendall voids significantly reduced the anti-penetration performance of Ti-Al3Ti laminated composites.Based on the above research,the relationships between the preparation process,microstructure,anti-penetration performance and mechanism of Ti-Al3Ti laminated composites were given,which provide a theoretical basis for the preparation process and practical application of Ti-Al3Ti laminated composites. |
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