Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-27T11:03:38.422Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure of Laser Surface Melted Nickel Aluminum Bronze

Published online by Cambridge University Press:  02 July 2020

J.C. Bennett  and
C.V. Hyatt
J.C. Bennett
Affiliation:
Department of Physics, Acadia University, Wolfville, Nova Scotia, CanadaBOP 1X0
C.V. Hyatt
Affiliation:
Defence Research Establishment Atlantic, Halifax, Nova Scotia, CanadaB3K 2X0
Get access

Extract

The copper alloys commonly referred to as nickel aluminum bronzes (NAB) are widely used in marine applications due to their excellent seawater corrosion resistance and good mechanical properties. Unfortunately, these alloys are susceptible to a variety of surface sensitive degradation processes such as cavitation and wear which significantly reduce service life. Laser surface melting and cladding techniques have recently demonstrated a potential to substantially enhance the performance of NAB components. This is associated with the occurrence of a martensitic or Widmanstätten transformation from the high temperature bcc β phase accompanied by precipitation of ordered intermetallic particles collectively referred to as κ. Optimization of these techniques requires an improved understanding of the evolution of microstructure in the NAB system under conditions of rapid solidification, however little data is currently available. In this paper, transmission electron microscopy is used to examine the microstructures of a series of laser surface melted NAB alloys containing from 8 to 12 wt. % Al, 3.8 to 6.5 wt. % Ni, 3.8 to 6.5 wt. % Fe, ∽1 wt. % Mn and, in some cases, lesser amounts of Ti or Zr.

Type
Metals and Alloys
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 868 - 869
Copyright
Copyright © Microscopy Society of America

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Hyatt, C.V., Magee, K.H. and Betancourt, T., Metall. Mater. Trans. A. 29A(1998)1677.CrossRefGoogle Scholar
2.Bezina, P., Int. Met. Rev. 27(1982)77.CrossRefGoogle Scholar
3.Hasan, F., Jahanafrooz, A., Lorimar, G.W. and Ridley, N., Metall. Trans. A. 13A(1982)1337.CrossRefGoogle Scholar
4.Hewitt, J.A., “Laser Surface Melting of Experimental Nickel Aluminum Bronze Alloys,” DREA CR/96/412, Defence Research Establishment Atlantic, Dartmouth, NS, Canada (1996).Google Scholar
5.Liu, Y., Mazumder, J.and Shibata, K., Metall. Trans. A. 25A(1994)37.CrossRefGoogle Scholar