DEPARTMENT OF DEFENSE TITANIUM SHEET-ROLLING PROGRAM TIME-TEMPERATURE-TRANSFORMATION DIAGRAMS OF THE TITANIUM SHEET-ROLLING-PROGRAM ALLOYS

摘要

The titanium alloys Ti-2. 5A1-16V, Ti-4Al-3Mo-lV, Ti-6A1-4V, and Ti-13V-llCr-3Al are being evaluated in the Department of Defense Titanium Sheet-Rolling Program. To assist in the determination of optimum heat treatments for these alloys, the kinetics of their transformations were studied for two heat-treatment cycles, and TTT diagrams were constructed. The TTT diagrams resulting from each heat-treatment cycle are shown on the following pages accompanied by a description of the important mechanis¬tic features of the transformations of each alloy.