Microstructure-related properties of explosively welded multi-layer Ti/Al composites after rolling and annealing

Abstract The processes of rolling and annealing explosively welded multi-layered plates significantly affect the functional properties composite. In current research, fifteen-layered composite were fabricated using a single-shot explosive welding technique. composites then rolled up to 72% reduce layer thickness, followed by at 625 °C for varying times 100 h. Microstructure evolution chemical composition changes investigated scanning electron microscopy equipped with energy-dispersive spectroscopy. mechanical evaluated tensile testing, while strengths individual layers near interface micro-hardness measurements. After welding, wavy interfaces always formed between top wave parameters decreasing as bottom approach. Due process, thickness Ti Al decreases, waviness disappeared. Simultaneously, necking fracture some observed. During annealing, corresponding 3 phase increased time. A study growth kinetic shows that is controlled reaction diffusion. results tests showed after fourfold increase hardness can be observed in relation Ti, Al, even 15 greater.