Additively manufactured metal matrix composites: a review of fatigue and creep resistance for in-service conditions

• • AM MMCs exhibit enhanced fatigue resistance due to refined grain structures and uniform reinforcement distribution, with reported improvements in fatigue life up to 200% compared to conventionally processed counterparts, critical for aerospace components under cyclic loading. • • Creep resistance is significantly improved in AM MMCs, with Inconel 718 fabricated by selective laser melting showing enhanced creep properties via boron-phosphorus interactions, achieving a 50% reduction in steady-state creep rate at 650°C, essential for turbine blades. • • In-situ TiC-reinforced high carbon wear-resistant steel, after heat treatment, demonstrates a 30% increase in wear resistance, attributed to the formation of hard TiC particles, which is vital for tooling and wear applications. • • The use of amorphous nanoparticles in AM MMCs provides dispersion hardening, leading to a 40% increase in yield strength without compromising ductility, offering a pathway to lightweight structural materials with superior strength-to-weight ratios.