Abstract:
In recent years, aluminum matrix composites have demonstrated significant advantages in the field of lightweight components by virtue of their high specific strength, high specific stiffness, favorable low-density characteristics, and excellent oxidation resistance. They have become important engineering materials for lightweight applications. Conventional forming processes hardly meet the current development demands of industrial manufacturing. Wire arc additive manufacturing (WAAM) offers a new technological approach for fabricating aluminum matrix composite components with homogeneous microstructures, owing to its favorable formability, high manufacturing accuracy, and short production lead time. The ceramic reinforcement phases used in aluminum matrix composites and their addition methods were first outlined. Then three novel wire arc additive manufacturing techniques: oscillating laser-arc hybrid additive manufacturing, ultrasonic vibration-assisted wire arc additive manufacturing, and wire-powder arc additive manufacturing were mainly introduced. The technical principles, advantages, and applicable scenarios of these techniques were compared and analyzed. Finally, the effects and limitations of post-processing techniques such as heat treatment and rolling were discussed, and future development directions were prospected.