THE FORMATION OF TiAl3 DURING HEAT TREATMENT IN EXPLOSIVELY WELDED Ti-Al MULTILAYERS

Metallic-intermetallic laminate (mil) composites are promising materials for structural applicationsespecially in the aerospace industry. one of the interesting laminate composites is the ti-tial3 multilayer. in this work,commercially pure sheets of aluminum and titanium with almost equal thickness of around 0.5 mm were explosivelyjoined. the achieved multilayers were annealed at 630 ? in different times so that an intermetallic layer was formedat the ti/al interface. the resulting microstructure was studied by optical and scanning electron microscopy andenergy dispersive spectroscopy (eds). tial3 was the only intermetallic phase that was observed in all annealingtimes. the kinetics of the formation of tial3 was investigated and compared to previous research studies performed onti-al multilayers which were fabricated using methods other than explosive welding.