Interaction among deformation, recrystallization and phase transformation of TA2 pure titanium during hot compression
(School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China)
Abstract: TA2 pure titanium was chosen to research the interaction among deformation, recrystallization and phase transformation during hot compression. The samples were hot compressed by thermal simulation method with different processing parameters. Variant selection induced by stress during cooling after compression was found. The prismatical texture component which featured that the [0001] direction perpendicular to the compressing direction produced preferentially under the compressing stress. As a result, the transformed α phase possesses strong prismatical texture which is different with the basal texture of compressed α phase. The minimum elastic strain energy is demonstrated to be the main reason that causes the variant selection. Dynamic recrystallization behavior and microstructure evolution during hot compression were also studied.
Key words: pure titanium; hot compression; phase transformation; texture; variant selection