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):

Report Date:

1987-02-01

Pagination or Media Count:

24.0

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.

Subject Categories:

  • Couplers, Fasteners and Joints
  • Metallurgy and Metallography
  • Fabrication Metallurgy
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE