Abstract
Nickel aluminum bronze (NAB) is a complex alloy used extensively in the marine environment. Fatigue strength of NAB is reduced by welding and prior seawater corrosion. This study investigated the combined effect of corrosion and plasma welding on the fatigue behavior of NAB. Natural seawater corroded samples were used in tension-tension cyclic loading tests to observe fatigue crack initiation, propagation, and failure. Fatigue cracks initiated from corrosion pits at the weld toe. Stress corrosion and fatigue cracks propagated along the path of β′ and κIII phases. A short crack growth model (SCGM) predicted fatigue strength using experimentally obtained material properties and corrosion pit dimensions. Model predictions were used to develop S-N curves and were within 30% of experimental results. The SCGM produced accurate and reliable fatigue life results that could be applied by industry to aid in revalidation decision making and inspection scheduling.
| Original language | English |
|---|---|
| Pages (from-to) | 4678-4695 |
| Number of pages | 18 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 47 |
| Issue number | 12 |
| Early online date | 8 Oct 2024 |
| DOIs | |
| Publication status | Published - 6 Nov 2024 |
Bibliographical note
Publisher Copyright:© 2024 The Author(s). Fatigue & Fracture of Engineering Materials & Structures published by John Wiley & Sons Ltd.
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