Abstract
AbstractImitating the structure of steel-reinforced concrete, a composite coupling good damping capacity and mechanical property was fabricated by pressure infiltration progress. The aluminum (Al) matrix composite was hybrid reinforced by 20% volume fraction of SiC particle (SiCp) and 20% volume fraction of TiNi fiber (TiNif). The damping capacity of the composite in the temperature range from 30°C to 290°C was studied using a dynamic mechanical analyzer (DMA). Due to the B19′→B2reverse martensitic transformation in TiNif, a damping peak showed up in the heating process. Furthermore, both the hysteretic effect of the martensite/variants interfaces in TiNifand the weak bonding interface between SiCpand TiNifwere attributed to the high damping capacity of the composite. After tension deformation, a compressive stress was formed in the composite in the heating process. With the help of compressive stress, the value of the damping peak was much higher than before, since the movement of dislocation in the Al matrix was easier.
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