HEAT TREATMENTS FOR OPTIMIZING MECHANICAL AND CORROSION RESISTING PROPERTIES OF NICKEL ALUMINUM BRONZES

This paper presents: 1) information on how to develop with heat treatment and with chemical composition optimum tensile properties in cast nickel-aluminum broze alloys; 2) data on their general responsiveness to various kinds of heat treatment exposures as evaluated by mechanical testing, metallographic disclosures of microstructure, and electron microprobe analysis of phases. Optimum tensile properties conjointly with increased resistance to dealloying corrosion accrue only when two conditions are concurrently fulfilled, namely: 1) optimum target chemistry is employed, 2) castings are subjected to an appropriate heat treatment for dispersal of all continuously connected precipitates segregated in grain boundaries, precipitates which by virtue of their dissimilarity to the solvant with respect to electrochemical properties provide inviting paths for dealloying corrosion. It is believed that the heat treatment aspects of this study, together with the metallographic microstructures which accompany it, and the microprobe research done on the chemistry of the dealloyed metal, will prove to be of value to metallurgists and materials engineers alike. /Author/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00281425
• Corporate Authors:

  American Society of Naval Engineers

  Suite 507, 1012 14th Street, NW
  Washington, DC  United States  20005
• Authors:
  • Duma, J A
• Publication Date: 1975-2

Media Info

• Features: References;
• Pagination: p. 45-64
• Serial:
  • Naval Engineers Journal
  • Volume: 87
  • Issue Number: 1
  • ISSN: 0028-1425

Subject/Index Terms

• TRT Terms: Aluminum alloys; Corrosion protection; Corrosion resistant alloys; Metal heating; Metallurgy; Nickel alloys; Tensile properties
• Uncontrolled Terms: Heat treatment
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00097519
• Record Type: Publication
• Source Agency: National Maritime Research Center, Kings Point
• Files: TRIS
• Created Date: Jul 24 1975 12:00AM