Analysis of the solidification and microstructure of two aluminium alloys reinforced with TiB₂ particles

Two aluminium alloys with 6 wt% TiB₂ particles are studied for applications where increased wear resistance and mechanical strength at high temperature are required. The incorporation of hard ceramic particles has a strong influence on the microstructure and properties of the alloys. TiB ₂ particles play an important role in the nucleation of the different phases of the alloys during solidification, and in the reduction of grain size and porosity. The solidification patterns of Al-Si₇Mg_0.3 + TiB₂ (6 wt%) and Al-Cu₅MgTi + TiB₂ (6 wt%) materials are compared to their corresponding non-reinforced alloys, and the microstructures are analyzed. Two aluminium alloys with 6wt% titanium diboride (TiB₂) particles have been studied. TiB₂ particles play an important role in the nucleation of the different phases of the alloys during solidification, and in the reduction of grain size and porosity. This study analyses the solidification patterns and microstructure of Al-Si ₇Mg_0.3+TiB₂ (6wt%) and Al-Cu ₅MgTi+TiB₂ (6wt%) materials compared to their corresponding non-reinforced alloys.