Accession Number : AD0824092

Title :   DISPERSION STRENGTHENED ALPHA TITANIUM ALLOYS.

Descriptive Note : Technical rept. 1 May 66-31 Aug 67,

Corporate Author : GENERAL ELECTRIC CO CINCINNATI OH MATERIALS DEVELOPMENT LAB OPERATION

Personal Author(s) : Antony, K. C.

Report Date : NOV 1967

Pagination or Media Count : 135

Abstract : The effects of silicide volume fraction, processing/heat treatment, and zirconium-compensation on the tensile, creep and creep stability properties of a Ti-6Al-3Sn-3Zr base alloy were determined. Processing/heat treatment and silicon content were shown to be dominant factors in determining creep strength. Beta heat treatments coupled with silicon contents greater than 0.3% were necessary to achieve high-temperature creep strengths superior to those of commercial titanium alloys. Internal stability was satisfactory provided the oxygen content was sufficiently low (<1500 ppm) but surface stability (air contamination) was exceptionally severe in the beta-annealed condition.

Descriptors :   *DISPERSION HARDENING), (*TITANIUM ALLOYS, (*SILICON ALLOYS, TITANIUM ALLOYS), SILICIDES, CARBIDES, TENSILE PROPERTIES, TEMPERATURE, IMPACT TESTS, BENDING, CREEP, HEAT TREATMENT, MICROSTRUCTURE, TIN ALLOYS, ZIRCONIUM ALLOYS, ALUMINUM ALLOYS.

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE