Solid Solution Strengthening and Fundamental Design of Titanium Alloys
Technical rept. Jul 1970-Aug 1972
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
Phase stabilization and solid solution strengthening in titanium alloys are discussed from an electronic viewpoint. Based on the structure dependence of cohesive energy, we rationalize the alpha and beta-stabilization of titanium as produced by alloying with nontransition and transition metals, respectively and point out that only the addition of alpha-stabilizers will yield significant strengthening effect. The preference of multicomponent alloying, i.e., adding several nontransition metal solutes to titanium or otherwise beta-stabilized alloys, can also be justified from the concept to be described. Correlations between physical and mechanical properties of prototype systems Ti-Al, Ti-Ga, Ti-Sn, Ti-Al-Ga, Ti-Mo, and Ti-Mo-Fe-Al are presented to demonstrate the validity of the fundamental approach, which should eventually develop into useful alloy design criteria.
- Properties of Metals and Alloys