Accession Number : AD0778462

Title :   The Development of Heat-Resistant Titanium Alloys.

Descriptive Note : Technical rept. May 69-Oct 73,

Corporate Author : CINCINNATI UNIV OHIO DEPT OF MATERIALS SCIENCE AND METALLURGICAL ENGINEERING

Personal Author(s) : Hoch,Michael ; Birla,Naresh C. ; Cole,S. A.

Report Date : DEC 1973

Pagination or Media Count : 63

Abstract : A classification for heat resistant titanium alloys was developed and possible new approaches for synthesizing new high temperature alloys were elucidated. X-Ray diffraction techniques were used to determine the strain in the alpha-phase of Ti-Al-Ga alloys associated with the alpha sub 2-phase caused by the addition of Al and/or Ga. The maximum values of strains were 0.16%, 0.10% and 0.088% in Ti80Al10Ga10, Ti88Al6Ga6 and Ti84Al8Ga8 alloys, respectively, where composition is given in atomic percent. An attempt was made to determine the phase boundary between alpha and (alpha + alpha sub 2) in the Ti-Al-Ga ternary system. The thermodynamic properties of titanium-aluminum, titanium-gallium, titanium-tin and titanium-aluminum-gallium were investigated. Thermodynamic activity measurements and binary interaction parameters were obtained using a high temperature Knudsen cell coupled with a time-of-flight mass spectrometer. (Author)

Descriptors :   *Titanium alloys, *Heat resistant alloys, Thermodynamics, Phase studies, Phase diagrams, Aluminum alloys, Gallium alloys, Strain(Mechanics)

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE