A study of shape memory alloy NiTi fiber/plate reinforced (SMAFR/SMAPR) Ti-Al laminated composites

Effect of shape-memory alloy NiTi fiber on microstructure and mechanical properties of continuous ceramic Al2O3 fiber-reinforced Ti/Al3Ti metal–intermetallic laminated composite

“…EDS analysis (spectra 1-2) results reveal that apart from residual Al, the gray phase is Al 3 Ni and the dark-gray phase includes Al 3 Ti and Al 3 Ti 0.8 V 0.2 , which are in accordance with our previous work 24 and Wang et al's work. 23,25 Therefore, it can be concluded that zone I adjacent to the Ti layer contains Figure 6 shows the SEM images of the Al 2 O 3 fiber/ intermetallic interfaces in CFR-MIL and CSMAFR-MIL composites. Obviously, no macrodefects can be found along with the interface, suggesting that the interfacial bonding of Al 2 O 3 fiber with intermetallic is metallurgical in the CSMAFR-MIL composite (Figure 6(b)).…”

“…It is worth noting that no parallel crack is observed in the midarea of brittle intermetallic layer and the intermetallics break into large pieces, which is different from previously reported results. 14,23,27,28 This means that the centerline has been removed from the intermetallic layer, which improves strength of the composite. Figure 8(b) and (c) displays the microstructure of fractured surface of Ti layer and intermetallic layer, respectively.…”

“…20 During fracture, cracks were always preferential to nucleate and propagate at the centerline and the interface between fiber and intermetallic, both of which are harmful to the mechanical performances of the composites. Recently, Wang et al 22,23 selected shape-memory alloy (SMA) titanium nickel (NiTi) fiber as reinforcement to introduce into Ti-Al MIL composite via foil metallurgical technique. It is surprised to find that the centerline defect disappears in this novel composite credited to the diffusion reaction took place between liquid Al and NiTi fiber.…”

Effect of friction stir welding on mechanical properties and fracture mechanism of 7B52 Al laminated composite

“…They also bear excellent particular performances, such as ballistic protection, blast mitigation, thermal management, heat exchange and vibration damping [11]. Besides, the mechanisms of deformation and fracture of laminated composites differ greatly from those of uniform materials [12]. The interfaces between metallic-intermetallic layers result in the deviation and deceleration of propagating cracks, increasing the reliability of the material [13].…”

A Combined Analytic, Numeric, and Experimental Investigation Performed on NiTi/NiTiCu Bi‐Layer Composites under Tensile Loading

“…However, employing different experimental procedures to improve the properties, results in desirable and different mechanical behaviors to some extent . Moreover, using composite, multi‐layered or functionally graded NiTi‐based components produces different mechanical characteristics that can be useful in different applications . Recently, a bi‐layered NiTi thin film deposited on Si substrate exhibited a combined pseudo‐elastic behavior and shape memory effect at the same time.…”