Fatigue strength of additively manufactured hot-dip galvanized steel coated with a Zn–5Al alloy

Abstract

This study aims to investigate the fatigue resistance of additively manufactured steel plates with galvanized surfaces using a Zn–5Al alloy. In addition to fatigue tests, this study examined the effect of hot-dip galvanization (HDG) on fatigue resistance by investigating the surface roughness, zinc layer condition, and quasi-static tension on both galvanized and ungalvanized specimens. The filling effect of the zinc coating using a Zn–5Al alloy on the surface was also examined, as it influences the surface shape and smooths local areas, leading to an improvement in fatigue resistance compared with conventional galvanized surfaces. Overall, this study provides insight into the effects of HDG on the fatigue resistance of additively manufactured steel plates with galvanized surfaces.