Accession Number : AD0273142

Title :   HARD PARTICLE STRENGTHENING OF REFRACTORY METALS FOR HIGH TEMPERATURE USE THROUGH INTERNAL OXIDATION.

Descriptive Note : Final rept. 1 Jan-31 Dec 61,

Corporate Author : NEW ENGLAND MATERIALS LAB INC MEDFORD MASS

Personal Author(s) : Bufferd ,A. S. ; Zwilsky ,K. M. ; Grant,N. J.

Report Date : 31 DEC 1961

Pagination or Media Count : 33

Abstract : Mo-1.5% Ti powder in the 2 to 50 micron size range was internally oxidized by the formation of a MoO2 film on the powder particles and TiO2 formation during a diffusion-sintering treatment. Diffusion-sintering was carried out in an Ar or H atmosphere to investigate the effects of this atmosphere on the resultant structure. Fabrication of Mo base powder compacts was improved by prior hot upsetting and vacuum canning before extrusion of alloy billets. The most successfully extruded alloys had a recrystallization temperature in excess of 2800 F and a yield strength greater than the tensile strength of arc cast Mo-1.5% Ti at 2200 F. (Author)

Descriptors :   *DISPERSION HARDENING, *MOLYBDENUM ALLOYS, *REFRACTORY MATERIALS, ALLOYS, DIFFUSION, DIOXIDES, HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, METALS, MOLYBDENUM COMPOUNDS, OXIDATION, OXIDES, POWDER ALLOYS, POWDER METALS, SINTERING, TITANIUM ALLOYS, TITANIUM COMPOUNDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE