DISPERSION-STRENGTHENED VANADIUM ALLOYS.

Abstract

Dispersion-strengthening mechanisms are being investigated as a means of improving creep and stress-rupture properties of vanadium-niobium base alloys. Heat-treating studies of arcmelted and wrought materials containing hafnium or zirconium with carbon indicated that compositions based on V-60w/oNb are comparatively susceptible to hardening by traces of atmospheric contaminants after prolonged exposure at 2000 and 2300 F. Virtually no room-temperature hardening was observed in V-40w/oNb-30w/o Ta base alloys exposed to the same annealing atmospheres. Carbide and oxide dispersants were produced in a V-60w/oNb-1w/o Ti matrix by powder metallurgy techniques. After sintering the compacted powders for 10 minutes at 2800 F and annealing for 16 hours at 2400 F, compositions containing HfC and ZrC exhibited little hardening of the V-Cb-Ti alloy matrix. Dispersions of yttria, lanthana, and hafnia produced large increases in the room-temperature hardness of the matrix after sintering and annealing. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 09, 1963
Accession Number
AD0418081

Entities

Organizations

  • IIT Research Institute

Tags

DTIC Thesaurus Topics

  • Advanced Materials
  • Alloys
  • Annealing
  • Biomedical And Dental Materials
  • Dispersions
  • Hardening
  • Hardness
  • Materials
  • Metallurgy
  • Powder Metallurgy
  • Sintering
  • Vanadium
  • Vanadium Alloys

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.