Intermetallic Formation by Heat Treatment of Explosively Welded Al-Ti Layers

Metallic-intermetallic laminate (MIL) composites are promising materials for the aerospace industry and other applications. One of the interesting laminate composites is Ti-TiAl3. In this work commercially pure aluminum and titanium with almost equal thickness (almost 0.5 mm) joined explosively together and then rolled. The resulted composite annealed in 630 ℃ in different times to form intermetallic. The resulted structure studied by optical and scanning electron microscopy and Energy Dispersive Spectroscopy (EDS). TiAl3 was the only phase that observed in all annealing periods. Kinetics of the formation of TiAl3 calculated and compared to the researches that had been done on Ti-Al layers (without explosive welding). The effect of explosive welding and rolling on the kinetics of intermetallic formation was investigated.

Keywords:

Intermetallics , laminate composites , TiAl3 , Intermetallic formation kinetics