Advancements in Friction Stir Welding: Microstructural and Mechanical Enhancement of AA6061-B4C Welded Composites
摘要
The addition of reinforcements into aluminum alloys has recently gained considerable attention, aiming to improve their microstructure and mechanical characteristics for various applications. The current investigation studies the impact of B4C reinforcements on the microstructural and mechanical characteristics of friction stir welding (FSW) of AA6061 with different rotational speeds. Optical and scanning electron microscopy techniques have been used to analyze the microstructural evolution. Particle dispersion and interactions of B4C reinforcing agents and the aluminum matrix of the welded regions were given particular attention. Mechanical characteristics, including hardness and strength, were systematically studied for the FSWed weld composites produced at various rotational speed values. The results revealed that incorporating B4C particles had a pronounced effect on the mechanical characteristics of the AA6061 alloy, primarily by enhancing tensile strength and hardness. The maximum strength and hardness combination was achieved at the 1050 rpm rotational rates.