The role of microstructure of nickel–aluminium–bronze alloy on its cavitation corrosion behavior in natural seawater

Al-Hashem, Abdulhameed; Riad, W. T.

doi:10.1016/s1044-5803(02)00196-1

Cited by 116 publications

(64 citation statements)

References 8 publications

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“…On analysing under the SEM, it was observed that under cathodic protection the number of cavities had actually increased, which has also been reported in the literature [14], [15]. Hence, there was an increase in the mass loss observed when applying cathodic protection, although the grain-boundary attack was lower than that found in distilled water.…”

Section: Synergy Evaluationsupporting

confidence: 77%

“…The alloy's property comes from a very complex network of microstructures. It generally consists of columnar grains of face centred cubic (FCC) copper-rich solid solution known as α-phase and a small volume fraction of β-phase or retained martensitic β'-phase, surrounded by a series of intermetallic Fe-rich kappa phases [14], [16], [44]- [46].…”

Section: Test Materialsmentioning

confidence: 99%

“…κIII phase is a fine lamellar "finger-like" eutectoid structure and forms at the boundary of κI phase [14], [44], [45], [47], [48].…”

Section: Test Materialsmentioning

confidence: 99%

“…To understand the behaviour of NAB in different cavitation erosion and corrosion conditions, substantial studies have been done to understand its microstructural characteristics, and the relationship between cavitation erosion and corrosion occurring in NAB [14]- [17]. This combined interaction between erosional aspects of cavitation and corrosion is termed as synergy.…”

Section: Introductionmentioning

confidence: 99%

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Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Basumatary

Wood

2020

Tribology International

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Section: Synergy Evaluationsupporting

confidence: 77%

Section: Test Materialsmentioning

confidence: 99%

“…κIII phase is a fine lamellar "finger-like" eutectoid structure and forms at the boundary of κI phase [14], [44], [45], [47], [48].…”

Section: Test Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Basumatary

Wood

2020

Tribology International

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“…Low cooling rates will produce larger grain sizes, microsegregation of the alloying elements, increased size of K precipitates, and more microdefects. [11] Friction stir processing can be used to refine the grain size and microstructure near the surface of the cast NAB, resulting in a separation and decomposition of coarse Widmansta¨tten a phase as well as K phases. [12] FSP reduces or removes casting porosities and produces a more uniform distribution of phases.…”

Section: A Microstructural Properties Of Nabmentioning

confidence: 99%

Feasibility Study of Low Force Robotic Friction Stir Process and its Effect On Cavitation Erosion and Electrochemical Corrosion for Ni Al Bronze Alloys

Ahmad

Pan

et al. 2014

Metall Mater Trans B

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Robotic friction stir processing (FSP) has not been widely researched to date. This is perhaps due to the limited force capabilities of industrial robots in comparison with dedicated commercial FSP equipment. When operating a FSP machine, the force used to plunge the tools may range from 5000 to 8000 N which is currently beyond the capability of most robots. However, the capacity of robotic manipulators is increasing, so low force friction stir processing is becoming feasible. The ability of the robot arm to apply a controlled force that is normal to a 3-dimensional surface without the need to reorient the workpiece makes it a very useful tool for FSP of complex components. In this analysis, a robot arm with a capacity of 2500 N is used to improve the surface properties of nickel aluminum bronze (NAB) using low force FSP. Multiple passes were applied to the surface of the test sample for a more consistent spread of the stir zone. The sample was then microhardness tested and demonstrated a 62 pct increase in surface hardness. Cavitation erosion testing of the original and processed surfaces was also performed as per ASTM G-32. The erosion rate of the processed NAB sample was 44 pct of the rate experienced by the original cast NAB sample. Finally, the corrosion potentials of FSP NAB were measured at 45 mV less anodic than the unprocessed material, indicating that the processed material is more noble relative to the cast NAB sample. Robotic friction stir processing (FSP) has not been widely researched to date. This is perhaps due to the limited force capabilities of industrial robots in comparison with dedicated commercial FSP equipment. When operating a FSP machine, the force used to plunge the tools may range from 5000 to 8000 N which is currently beyond the capability of most robots. However, the capacity of robotic manipulators is increasing, so low force friction stir processing is becoming feasible. The ability of the robot arm to apply a controlled force that is normal to a 3-dimensional surface without the need to reorient the workpiece makes it a very useful tool for FSP of complex components. In this analysis, a robot arm with a capacity of 2500 N is used to improve the surface properties of nickel aluminum bronze (NAB) using low force FSP. Multiple passes were applied to the surface of the test sample for a more consistent spread of the stir zone.The sample was then microhardness tested and demonstrated a 62 pct increase in surface hardness. Cavitation erosion testing of the original and processed surfaces was also performed as per ASTM G-32. The erosion rate of the processed NAB sample was 44 pct of the rate experienced by the original cast NAB sample. Finally, the corrosion potentials of FSP NAB were measured at 45 mV less anodic than the unprocessed material, indicating that the processed material is more noble relative to the cast NAB sample.

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Influence of Ultrasound on Corrosion Kinetics and its Application to Corrosion Tests

Doche

Hihn

2012

Power Ultrasound in Electrochemistry

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The role of microstructure of nickel–aluminium–bronze alloy on its cavitation corrosion behavior in natural seawater

Cited by 116 publications

References 8 publications

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Feasibility Study of Low Force Robotic Friction Stir Process and its Effect On Cavitation Erosion and Electrochemical Corrosion for Ni Al Bronze Alloys

Influence of Ultrasound on Corrosion Kinetics and its Application to Corrosion Tests

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