Accession Number:

AD0251977

Title:

DEVELOPMENT OF IMPROVED METHODS FOR COLD EXTRUSION OF TITANIUM

Descriptive Note:

Final technical engineering rept. 1 Feb 1959-31 Jul 1960

Corporate Author:

BATTELLE MEMORIAL INST COLUMBUS OH

Report Date:

1961-03-01

Pagination or Media Count:

85.0

Abstract:

Cold extrusion techniques evolved from this study were applied to the production of aircraft flareless-tube nuts of AMS4902 Ti commercially pure with savings of about 58 in materials, 20 in fabrication, and 48.5 in total costs over those produced from solid bar stock. Precision hollow shapes of unalloyed Ti and Ti-3Al-2.5V alloy were backward extruded at 50 reduction at practical working pressures, with fluoride-phosphate coatings and properly designed punches. The optimum punch tip was a segment of a circle with a half angle of 70 degrees for backward extrusion at 340,000 psi as compared with 400,000 psi for a flat punch. Extrudability potentials were determined at 80, 500, and 1000 F for Ti-13V11Cr-3Al, Ti-3Al-2.5V, Ti-6Al-4V, Ti-16V-2.5Al, and Ti-8Al-1Mo-1V alloys. Forward-extr,000 psi were required to cold extrude the all beta Ti-13V-11Cr-3Al alloy into solid round bars.

Subject Categories:

  • Metallurgy and Metallography
  • Fabrication Metallurgy
  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE