Comparison of Corrosion and Cavitation Erosion Behaviors Between the As-Cast and Friction-Stir-Processed Nickel Aluminum Bronze

CORROSION ◽  
10.5006/0984 ◽  
2013 ◽  
Vol 69 (11) ◽  
pp. 1111-1121 ◽  
Author(s):  
Q.N. Song ◽  
Y.G. Zheng ◽  
S.L. Jiang ◽  
D.R. Ni ◽  
Z.Y. Ma
Keyword(s):  
Cavitation Erosion ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Friction Stir ◽  
Nickel Aluminum Bronze

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.

Enhancement of Ductility and Strength through Microstructural Refinement by FSP of Nickel Aluminum Bronze

2006 ◽  
Vol 503-504 ◽  
pp. 161-168 ◽  
Author(s):  
Keiichiro Oh-ishi ◽  
Alexandre P. Zhilyaev ◽  
Terry R. McNelley
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Plastic Deformation ◽  
Physical Metallurgy ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Microstructural Refinement ◽  
Friction Stir ◽  
Thermomechanical Cycle ◽  
Nickel Aluminum Bronze

Friction stir processing (FSP) is a severe plastic deformation (SPD) method that has been applied to as-cast NiAl bronze (NAB) materials, which are widely used for marine components. The thermomechanical cycle of FSP results in homogenization and refinement, and the selective conversion of microstructures from a cast to a wrought condition. The physical metallurgy of NAB is complex and interpretation of the effects of FSP on microstructure has required detailed analysis by optical and electron microscopy methods. Annealing and isothermal hot rolling have been employed to confirm microstructure-based estimates of stir-zone peak temperatures. The variation of mechanical properties was assessed by use of miniature tensile samples and correlated with microstructure for samples from stir zones of single and multi-pass FSP. Exceptional improvement in strength – ductility combinations may be achieved by FSP of NAB materials.

Microstructure and Microtexture Development during Friction Stir Processing of Nickel Aluminum Bronze

2012 ◽  
Vol 18 (S2) ◽  
pp. 1662-1663
Author(s):  
T. McNelley ◽  
S. Menon
Keyword(s):  
Friction Stir Processing ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Friction Stir ◽  
Nickel Aluminum Bronze ◽  
Microstructure And Microtexture

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

Mechanical Evaluation of Mixed As-Cast and Friction Stir Processed Zones in Nickel Aluminum Bronze

2008 ◽  
Vol 5 (5) ◽  
pp. 101544
Author(s):  
Allison Nolting ◽  
Leon M. Cheng ◽  
James Huang ◽  
R. Neu ◽  
K. Wallin ◽  
...  
Keyword(s):  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Friction Stir ◽  
Nickel Aluminum Bronze
Sign in / Sign up

Export Citation Format

Share Document