Accession Number : ADA105263


Title :   Survey of Nickel-Aluminium-Bronze Casting Alloys on Marine Applications,


Corporate Author : MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)


Personal Author(s) : Weston,G M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a105263.pdf


Report Date : Apr 1981


Pagination or Media Count : 38


Abstract : The structure and corrosion performance of nickel-aluminium bronze (NAB)--covered by naval specification DGS-8520 and DGS-348--have been investigated. No evidence was found to suggest that there would be any significant difference in corrosion performance between alloys meeting the two specifications. Early corrosion problems associated with the weld repair areas of castings have been overcome largely by using improved foundry and welding techniques followed by a heat-treatment procedure. Both crevice and pit corrosion still occur in operating systems. However, recent reports indicate that with improved NAB foundry practice this is less widespread, with penetration often being confined to the surface grains. (Author)


Descriptors :   *MECHANICAL PROPERTIES , *CORROSION RESISTANCE , *ALUMINUM , *NICKEL ALLOYS , *CASTINGS , MICROSTRUCTURE , NAVAL VESSELS , STRUCTURAL ANALYSIS , HEAT TREATMENT , WELD METAL , REPAIR , CASTING , VALVES , AUSTRALIA , MARINE ENGINEERING , GRAIN BOUNDARIES , FITTINGS , SALT WATER


Subject Categories : Properties of Metals and Alloys
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE