Fatigue versus corrosion: mechanical durability of additively manufactured 18Ni300 after heat treatment and aging

2026-08-08

Mihiretu Gezahagn Ganta *

Agnieszka Łagoda

Krzysztof Żak

Szymon Kołodziej

Jan Baran

Marta Kurek

DOI：10.1016/j.ijfatigue.2026.109909

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Abstract

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• Corrosion significantly reduces fatigue life of AM 18Ni300 maraging steel. • Surface defects (pits, microcracks) accelerate crack initiation and propagation. • Build orientation strongly influences corrosion–fatigue interaction. • Maximum degradation observed at intermediate build angles (30°–60°) • Corrosion increases hardness but decreases fatigue performance. • Surface integrity dominates over bulk mechanical strengthening effects. • ANOVA confirms stress as primary factor, with corrosion as key secondary driver.

Keywords:

Additive Manufacturing (AM)

18Ni300Maraging Steel (MS1)

Fatigue behavior

Corrosive aging

Acetic acid

Microstructural analysis

Fractography

Environmental degradation

Fatigue versus corrosion: mechanical durability of additively manufactured 18Ni300 after heat treatment and aging

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