Failure analysis of screw propellers and increase of fail safety by surface modification with multicomponent materials with shape memory effect

Blednova, Zhesfina Michailovna; Rusinov, Peter Olegovich; Dmitrenko, D. V.

doi:10.1016/j.prostr.2016.06.190

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…In this study, the optimum point was at H2SO4 concentration of 15%, when it was more than 15% it already in the saturated phase, which resulted in a decreased in the hardness value. This is consistent with the results of the study that increasing the concentration of H2SO4 solution by more than 17% resulted in decrease in the hardness value of the material, hence the concentration of 15% sulfuric acid is the optimal concentration for anodizing solution [20].…”

Section: Resultssupporting

confidence: 92%

Effect of Solution Concentration and Anodizing Coating Time on Hardness and Thickness Coating Of 7075-O Aluminum Alloy

Endramawan,

Sifa,

Suwandi

et al. 2024

IJATR

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One of the materials used in ship propellers is aluminum alloy. The advantages of aluminum are that it is easy to cast and relatively resistant to corrosion. This research aims to determine the effect of heat treatment and the effect of variations in the concentration of H2SO4 and immersion time in optimal of the anodizing process on the hardness value of 7075-O aluminum alloy (as-cast aluminum alloy). The method used is solution heat treatment at a temperature of 490ºC with a holding time of 6 hours, quenching using water or oil, with artificial aging at a temperature of 120ºC with a holding time of 24 hours. In the anodizing process, a sulfuric acid solution with various concentrations of 10%, 15%, and 20% with variations in immersion time of 10, 15, and 20 minutes. The results of vickers hardness test on heat-treated specimens with water quenching accompanied by artificial aging is 137.54 HV, it is increased by 47.44%. While the results of the vickers hardness test after anodizing is 213.09 HV, it is increased by 128.42%. Where the optimum hardness value was achieved at a concentration of 15% H2SO4 and an immersion time of 20 minutes. The coating thickness is equal to 25.79 µm.

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Section: Resultssupporting

confidence: 92%

Effect of Solution Concentration and Anodizing Coating Time on Hardness and Thickness Coating Of 7075-O Aluminum Alloy

Endramawan,

Sifa,

Suwandi

et al. 2024

IJATR

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“…Conventional propellers are made with metallic alloys, such as the widely used nickel and magnesium aluminium bronzes (NAB and MAB). Metallic alloys are susceptible to corrosion and fatigue, which lead to rapid degradation in performance and require maintenance out of programmed docking cycles [3][4][5]. These factors guided researchers to explore alternative materials [6][7][8] and propose fibre-reinforced composites as potential candidate materials due to their favourable mechanical properties such as higher directional stiffness and strength, lightweight, environmental resistance, and manufacturability to any shape.…”

Section: Introductionmentioning

confidence: 99%

Smart monitoring of a full-scale composite hydrofoil manufactured using automated fibre placement under high cycle fatigue

Shamsuddoha¹,

Prusty²,

Maung³

et al. 2021

Smart Mater. Struct.

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Fibre reinforced composites materials offer a pathway to produce passive shape adaptive smart marine propellers, which have improved performance characteristics over traditional metallic alloys. Automated fibre placement (AFP) technology can provide a leap forward in cyber-physical automated manufacturing, which is essential for the implementation and operation of smart factories in the marine propeller industry towards Industry 4.0 readiness. In this paper, a comprehensive structural health monitoring routine was performed on an AFP full-scale composite hydrofoil to gain confidence in its dynamic and structural performances through a number of active and passive sensors. The hydrofoil was subjected to constant amplitude flexural fatigue loading in a purpose-built test rig for 105 cycles. The hydrofoil was embedded with distributed optical fibre sensors, traditional electrical strain gauges and linear variable displacement transducers. Both microelectromechanical system and piezoelectric accelerometers were used to conduct experimental modal analyses to observe changes in the modal response of the hydrofoil at regular intervals throughout the fatigue program. The hydrofoils modal response, as well as the stiffness measured using both displacements and strains, remained unchanged over the fatigue loading regime demonstrating the structural integrity of the hydrofoil. The optical fibre sensors endured the fatigue test cycles showing their robustness under fatigue loads. Furthermore, the sensing systems demonstrated the potential of being utilised as a useful maintenance tool combining their adaptability with automated manufacturing during manufacturing through integration within the hydrofoil, a structural test framework for performance measurement, data acquisition and analytics for visualisation, and the prospect of decision making for maintenance requirement during any onset in structural performance.

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Perspectives of composition “Base – material with SME - ceramic material” for the formation of multipurpose surface layers on engineering products

Rusinov

Blednova

2017

Materials Today: Proceedings

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Failure analysis of screw propellers and increase of fail safety by surface modification with multicomponent materials with shape memory effect

Cited by 8 publications

References 5 publications

Effect of Solution Concentration and Anodizing Coating Time on Hardness and Thickness Coating Of 7075-O Aluminum Alloy

Effect of Solution Concentration and Anodizing Coating Time on Hardness and Thickness Coating Of 7075-O Aluminum Alloy

Smart monitoring of a full-scale composite hydrofoil manufactured using automated fibre placement under high cycle fatigue

Perspectives of composition “Base – material with SME - ceramic material” for the formation of multipurpose surface layers on engineering products

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