Accession Number : AD0466476


Title :   PHYSICAL METALLURGY OF ALLOY 718


Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH DEFENSE METALS INFORMATION CENTER


Personal Author(s) : Wagner, H J ; Hall, A M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/466476.pdf


Report Date : 01 Jun 1965


Pagination or Media Count : 33


Abstract : This report deals with the physical metallurgy of Alloy 718. Since Alloy 718 was first introduced, it has broadened its areas of application. Primarily, it was intended for use at medium temperatures, 1300 F at most, its main applications being in lightweight welded frames and other assemblies in aircraft turbojet engines. Its good properties in the range of temperatures from -423 to 1300 F make it especially suitable for use in the LOX-LH4 rocket engines. In these applications, Alloy 718 is used for the fuel/oxidizer injector plates, forged rings, thrust chamber jackets, turbine wheels, bellows, and tubing. This report presents information on the effect of composition and heat treatment on mechanical properties; trends in specifications for Alloy 718; microstructure and microconstituents of the alloy and the strengthening mechanism. No attempt has been made to present a complete compilation of design properties in this report.


Descriptors :   *NICKEL ALLOYS , ALUMINUM ALLOYS , SPECIFICATIONS , HARDENING , WELDING , NIOBIUM ALLOYS , BORON ALLOYS , HEAT RESISTANT ALLOYS , HEAT RESISTANT METALS , LOW TEMPERATURE ALLOYS , CARBON ALLOYS , CHROMIUM ALLOYS , METALLURGY , TITANIUM ALLOYS , IRON ALLOYS , PHASE STUDIES


Subject Categories : Properties of Metals and Alloys


Distribution Statement : APPROVED FOR PUBLIC RELEASE