Mechanism of Preparing Laminar Composite Using Ti-Based Amorphous Alloy

In this article amorphous alloy was used in preparing Ti-Al system laminar composite. Amorphous alloy strips and TC4 were stacked interactively. After thermoforming process a new structure laminar composite was prepared by using the activity performance of amorphous alloy. Every layer phase composition was determined after TEM and energy dispersive spectrum analysis. The special diffusion mechanics of this process was disclosed, which including two stages. The first was the plastic deformation stage before amorphous alloy crystallization and interface atoms bonded together under van der Waals force in the first stage. The second was crystal plane diffusion. The result of test displayed that the conversion zone was much thicker because of using the amorphous alloy. With tension testing and fracture analysis, the laminar composite expressed well crack extension property. The conversion zone had a strengthening faction and it could consume some damage energy from outer force. TC4 had toughening faction which could prevent the material breaking crisply.