THERMOMECHANICAL PROCESSING OF ALPHA-BETA TITANIUM ALLOYS

摘要

One embodiment of a method of refining alpha-phase grain size in an alpha-beta titanium alloy comprises working an alpha-beta titanium alloy at a first working temperature within a first temperature range in the alpha-beta phase field of the alpha-beta titanium alloy. The alloy is slow cooled from the first working temperature. On completion of working at and slow cooling from the first working temperature, the alloy comprises a primary globularized alpha-phase particle microstructure. The alloy is worked at a second working temperature within a second temperature range in the alpha-beta phase field. The second working temperature is lower than the first working temperature. The is worked at a third working temperature in a third temperature range in the alpha-beta phase field. The third working temperature is lower than the second working temperature. After working at the third working temperature, the titanium alloy comprises a desired refined alpha-phase grain size.

主权项

1. A method of refining alpha-phase grain size in an alpha-beta titanium alloy, the method comprising:
working an alpha-beta titanium alloy at a first working temperature within a first temperature range, wherein the first temperature range is in the alpha-beta phase field of the alpha-beta titanium alloy; slow cooling the alpha-beta titanium alloy from the first working temperature, wherein on completion of working at the first working temperature and slow cooling from the first working temperature, the alpha-beta titanium alloy comprises a primary globularized alpha-phase particle microstructure; working the alpha-beta titanium alloy at a second working temperature within a second temperature range, wherein the second working temperature is lower than the first working temperature, and wherein the second temperature range is in the alpha-beta phase field of the alpha-beta titanium alloy; and working the alpha-beta titanium alloy at a third working temperature in a third temperature range, wherein the third working temperature is lower than the second working temperature, wherein the third temperature range is in the alpha-beta phase field of the alpha-beta titanium alloy, and wherein after working at the third working temperature, the alpha-beta titanium alloy comprises a desired refined alpha-phase grain size.