增材制造金属材料在海洋环境下的耐蚀性能———综述

With the growing utilization of metal additive manufacturing technology in the field of marine engineering,the issue of seawater corrosion has emerged as a prominent concern for components produced through this innovative technology. Notably,the metal additive manufacturing alloys made of discrete-deposition forming method and rapid solidification characteristics have distinct microstructures which are different from those of conventional alloys,thereby present unique corrosion behaviors of these materials. This work is devoted to an in-depth exploration of five distinct alloy materials,specifically,austenitic stainless steel,duplex stainless steel,precipitation-hardened martensitic stainless steel,aluminum alloy (AlSi10Mg),and titanium alloy (Ti6Al4V). It emphatically discusses the profound influence of powder bed fusion and directed energy deposition methods on the microstructure and seawater corrosion resistance of these alloys. Moreover,it delves into heat treatment processes aimed at mitigating seawater corrosion in metal additive manufacturing alloys,and undertakes a comparative assessment of their corrosion resistance relative to that of conventional alloys. It also entails a summary on related research accomplishments,highlighted the prevailing challenges,and some insights into future prospects concerning the utilization of metal additive manufacturing technology within the field of metallic materials for marine engineering.