PROCESSING OF ALPHA-BETA TITANIUM ALLOY WORKPIECES FOR GOOD ULTRASONIC INSPECTABILITY

摘要

An alpha-beta titanium alloy workpiece, preferably furnished in the form of a cast ingot, is processed by mechanically working in the beta phase field and in the alpha-beta phase field, and thereafter quenching from the beta phase field. The workpiece is thereafter mechanically worked at a first alpha-beta phase field temperature in the alpha-beta phase field and quenched from the first alpha-beta phase field temperature. The workpiece is thereafter mechanically worked at a second alpha-beta phase field temperature in the alpha-beta phase field, wherein the second alpha-beta phase field temperature is lower than the first alpha-beta phase field temperature, and desirably quenched from the second alpha-beta phase field temperature. The resulting microstructure is a distribution of globularized coarse alpha-phase particles (30) and globularized fine alpha-phase particles (36) in fine transformed beta grains (38).