Natural Seawater Impact on Crack Propagation and Fatigue Behavior of Welded Nickel Aluminum Bronze

被引：0
作者：
Dobson, T. H. E. [1 ]
Wilson, P. [2 ]
Larrosa, N. O. [1 ,3 ]
Williams, M. [2 ]
Coules, H. E. [1 ]
机构：
[1] Univ Bristol, Solid Mech Res Grp, Bristol, England
[2] Univ Warwick, Warwick Mfg Grp, Warwick, England
[3] Basque Res & Technol Alliance BRTA, TECNALIA R&I, Donostia San Sebastian, Gipuzkoa, Spain
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2024年 / 47卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
fatigue strength prediction; natural seawater corrosion; nickel aluminum bronze (NAB); short crack growth modeling; S-N curves; SELECTIVE PHASE CORROSION; DEFORMATION-BEHAVIOR; PITTING CORROSION; INITIATION; MICROSTRUCTURE; GROWTH; LIMITS; MODEL; NAB;
D O I：
10.1111/ffe.14456
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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 beta ' and kappa III 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.
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收藏
页码：4678 / 4695
页数：18
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