A Brief Discussion about Nickel Aluminum Bronze Propeller Failure Modes and its Repair Methods

2016 ◽  
Vol 723 ◽  
pp. 125-129 ◽  
Author(s):  
Zheng Han Chen ◽  
Xiao Feng Sun ◽  
Yuan Lin Huang
Keyword(s):  
Cold Spray ◽  
Marine Environment ◽  
Failure Modes ◽  
Efficient Solutions ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Effective Solution ◽  
Nickel Aluminum Bronze

Nickel aluminum bronze is widely used in manufacturing propeller, in marine environment, propellers are easy to generate corrosion, it is important to find efficient solutions to repair corrosive propeller. In this study, it utilized OM and SEM to observe the failure modes of propeller, and discuss the feasibility of using cold spray (CS) technology to repair corrosive propeller. The study showed that failure modes of propeller includes corrosion, cavitations and abrasion, cold spray is possible an effective solution to solve these failures.

Preliminary Development of Cold Spray Procedures for Nickel Aluminum Bronze Casting Repair

2021 ◽  
Vol 1016 ◽  
pp. 971-977
Author(s):  
Cameron Munro ◽  
Phuong Vo ◽  
Bruno Guerreiro
Keyword(s):  
Cold Spray ◽  
Cavitation Erosion ◽  
High Heat ◽  
Spray Parameters ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Corrosion Performance ◽  
High Heat Input ◽  
Nickel Aluminum Bronze ◽  
Bronze Casting

Nickel aluminum bronze (NAB) castings possess favourable combinations of strength and resistance to corrosion, biofouling and cavitation/erosion, and so have long been used in naval applications. Nonetheless, in seawater environments NAB castings are susceptible to selective phase corrosion and so such components periodically require either replacement, which is very costly, or repair. However, repairs involving traditional, high heat input welding operations can lead to distortion and microstructural changes that unacceptably degrade NAB corrosion performance, and so repairs are not commonly performed. In the present work, cold spray is explored as an alternative for NAB (alloy CuAl9Fe5Ni5) repair without excessive distortion or base metal degradation, and preliminary results of its performance reported. Suitable cold spray parameters have been determined using an iterative approach by analyzing deposits in terms of microstructure, porosity and adhesion to the substrate. It is intended that these parameters will later be used to create simulated repairs which can be more thoroughly characterized for strength, toughness and corrosion performance.

Laser freeforming of nickel-aluminum bronze

1999 ◽  
Author(s):  
Kenneth C. Meinert ◽  
Eric J. Whitney
Keyword(s):  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Nickel Aluminum Bronze

CONCAST AMS 4880-C95510

Alloy Digest ◽  
2019 ◽  
Vol 68 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Metal Products ◽  
Nickel Aluminum Bronze ◽  
Bronze Casting

Abstract AMS 4880-C95510 is a nickel-aluminum bronze casting useful for bushings and bearings. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on machining. Filing Code: Cu-895. Producer or source: Concast Metal Products Company.

AUR-O-MET 57

Alloy Digest ◽  
1956 ◽  
Vol 5 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tensile Properties ◽  
Abrasion Resistance ◽  
Heat Treating ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
High Nickel ◽  
Nickel Aluminum Bronze

Abstract AUR-O-MET 57 is a high nickel-aluminum bronze that was developed primarily for its abrasion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on heat treating, machining, and joining. Filing Code: Cu-42. Producer or source: Aurora Metal Company.

PROMET 115N

Alloy Digest ◽  
1967 ◽  
Vol 16 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Corrosion Resistant ◽  
Nickel Aluminum Bronze

Abstract PROMET-115N is a heat treatable nickel-aluminum bronze recommended for corrosion resistant, high strength bearings, gears and castings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-175. Producer or source: American Crucible Products Company.

scholarly journals Process Selection for the Fabrication of Cavitation Erosion-Resistant Bronze Coatings by Thermal and Kinetic Spraying in Maritime Applications

2021 ◽  
Author(s):  
Michél Hauer ◽  
Frank Gärtner ◽  
Sebastian Krebs ◽  
Thomas Klassen ◽  
Makoto Watanabe ◽  
...  
Keyword(s):  
Service Life ◽  
Cold Spraying ◽  
Arc Spraying ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Process Selection ◽  
Hvof Spraying ◽  
Warm Spraying ◽  
The Right ◽  
Nickel Aluminum Bronze

AbstractThe present study compares prerequisites for cavitation-resistant bronzes production by different coating techniques, namely cold spraying, HVOF spraying, warm spraying and arc spraying. If optimized to maximum cavitation resistance, the deposited coatings can increase the service life of ship rudders significantly. Furthermore, these methods could enable repair processes for ship propellers. This study is meant to help selecting the right coating technology to achieve best cavitation protection for a given set of requirements. Using high-pressure warm spraying and cold spraying, properties similar to those of cast nickel aluminum bronze are achieved. Also, coatings produced by using HVOF and arc spraying have erosion rates that are only about four, respectively, three times higher as compared to cast nickel aluminum bronze, while by far outperforming bulk shipbuilding steel. Their properties should be sufficient for longer service life, i.e., less docking events for ship rudder repair. Hence, with respect to costs, HVOF and arc spraying could represent a good compromise to reach the specified coating properties needed in application, potentially even for propeller repair.

scholarly journals Effect of Fluid Flow on the Corrosion Performance of as-Cast and Heat-Treated Nickel Aluminum Bronze Alloy (UNS C95800) in Saline Solution

2021 ◽  
Vol 2 (1) ◽  
pp. 61-77
Author(s):  
Hamid Reza Jafari ◽  
Ali Davoodi ◽  
Saman Hosseinpour
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Flow Rate ◽  
Solution Temperature ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Nacl Solution ◽  
Flow Conditions ◽  
Heat Treated ◽  
Nickel Aluminum Bronze

In this work, the corrosion behavior and surface reactivity of as-cast and heat-treated nickel aluminum bronze casting alloy (UNS C95800) in 3.5 wt% NaCl solution is investigated under stagnant and flow conditions. Increasing flow rate conditions are simulated using a rotating disk electrode from 0 to 9000 revolutions per minute (rpm). Optical micrographs confirm the decrease in the phase fraction of corrosion-sensitive β phase in the microstructure of C95800 after annealing, which, in turn, enhances the corrosion resistance of the alloy. Electrochemical studies including open circuit potentiometry, potentiodynamic polarization, and electrochemical impedance spectroscopy are performed to assess the effect of flow rate and heat treatment on the corrosion of samples at 25 and 40 °C in 3.5 wt% NaCl solution. For both as-cast and heat-treated samples, increasing the flow rate (i.e., electrode rotating rate) linearly reduces the corrosion resistance, indicating that the metal dissolution rate is significantly affected by hydrodynamic flow. Increasing the solution temperature negatively impacts the corrosion behavior of the as-cast and heat-treated samples at all flow conditions.

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