Accession Number : AD0610235

Title :   AN INVESTIGATION OF THE GAMMA PHASE OF THE TITANIUM-ALUMINUM BINARY ALLOY WITH ZIRCONIUM ADDITIONS.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Troup,Duane H.

Report Date : AUG 1962

Pagination or Media Count : 99

Abstract : The titanium-aluminum equiatomic alloy has qualities of excellent corrosion resistance, good strength to weight ratio, and good hot hardness. These qualities would make this alloy a desirable structural material were it not for an inherent brittleness and lack of ductility. The brittleness is attributed to an ordered-face-centered-tetragonal cell with a c/a ratio of 1.020. Several attempts have been made to reduce the c/a ratio to unity through ternary additions. A reduction of this ratio to 1.006 has been reported with zirconium as the ternary addition; however, this value was attained outside of the gamma phase. During this investigation the limit of solubility of zirconium in the gamma phase at 2325F was determined to be slightly less than 10a/o at 55a/o aluminum and slightly more than 10a/o at 60a/o aluminum. The c/a ratio varied with composition from 1.016 to 1.030. (Author)

Descriptors :   (*TITANIUM ALLOYS, PHASE STUDIES), (*ALUMINUM ALLOYS, PHASE STUDIES), ZIRCONIUM ALLOYS, CORROSION RESISTANT ALLOYS, TENSILE PROPERTIES, HARDNESS, BRITTLENESS, DUCTILITY, METALLOGRAPHY, X RAY DIFFRACTION, CRYSTAL LATTICES, CRYSTAL STRUCTURE, SOLUBILITY, SOLID SOLUTIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE