Accession Number : ADA184202

Title :   Gas Tungsten Arc Welding of Al-10Fe-5Ce.

Descriptive Note : Final rept. Jun 83-Jun 86,

Corporate Author : AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH

Personal Author(s) : Metzger,Guinn E

PDF Url : ADA184202

Report Date : Feb 1987

Pagination or Media Count : 24

Abstract : Thin sheet of the powder metallurgy aluminum alloy A1-10Fe-5Ce was fusion welded with the gas tungsten arc welding process. The effect of preweld vacuum heat treatment, filler metal, and the type of welding current was investigated. The gross porosity of welds made with untreated base metal was virtually eliminated by the use of a combination of preweld vacuum heat treatment and a direct current electrode negative (DCEN) welding arc with helium shielding gas. The required heat treatment is estimated to be 20 hours at 750 F, which results in a reduction in the base metal tensile strength from about 65 to 60 ksi. However, the presence of brittle phases near the weld interface causes low ductility and low strength. The tensile elongation at room temperature of longitudinal welds was about 1%, and the tensile strength joint efficiency of transverse welds was 55% when tested at room temperature, and 81% at a testing temperature of 600 F. Keywords: Gas tungsten arc welding, Aluminum alloy, Powder metallurgy, High temperature.

Descriptors :   *ALUMINUM ALLOYS, *GAS TUNGSTEN ARC WELDING, BRITTLENESS, PHASE, HEAT TREATMENT, HIGH TEMPERATURE, DUCTILITY, BASE METAL, TENSILE STRENGTH, DIRECT CURRENT, ELECTRODES, POROSITY, WELDS, HELIUM, LOW STRENGTH, FUSION WELDING, HYDROGEN, HYDROGEN PEROXIDE, PHOTOMICROGRAPHY, WELDMENTS, IRON, CERIUM, POWDER METALLURGY, ELONGATION, SHEETS, THINNESS, INTERFACES, EFFICIENCY

Subject Categories : Couplers, Fasteners, and Joints
      Metallurgy and Metallography
      Fabrication Metallurgy
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE