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/

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  • Corporate Authors:

    American Society of Naval Engineers

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

Media Info

  • Features: References;
  • Pagination: p. 45-64
  • Serial:

Subject/Index Terms

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