Accession Number : AD0771916

Title :   On the High Temperature Deformation of Titanium-Aluminum Alloys.

Descriptive Note : Final rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : French,Robert D.

Report Date : OCT 1973

Pagination or Media Count : 19

Abstract : rientation(Direction), Strain(Mechanics), Turbine bladesA study of high temperature deformation in the titanium-aluminum binary system was undertaken to support the development of titanium alloys for use over the temperature range 900F to 1200F. Specimens containing four, five, six, eight and ten weight % aluminum were creep tested to compare single-phase material with an alloy containing a second phase, Ti3Al. The starting material is shown to have a strong texture which is related to a reduction in the difference in critical resolved shear stress between the basal and prismatic planes. Creep testing revealed that the activation energy for steady state creep is a function of stress and aluminum content over the temperature range of 900F to 1400F but was inconclusive in identifying the principal mode of deformation. (Author)

Descriptors :   *Titanium alloys, *Aluminum alloys, Deformation, High temperature, Creep, Microstructure, Activation energy, Diffusion, Crystals, Orientation(Direction), Strain(Mechanics), Turbine blades

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE