A variant selection mechanism in the deformed and recrystallized β matrix of a metastable β-titanium alloy. (3rd July 2018)

• Record Type: Journal Article
• Authors: Panda, Subrata; Banerjee, Dipankar; Avadhani, Ganesh S.; Suwas, Satyam
• Is Part Of: Philosophical magazine letters. Volume 98:Number 7(2018)
• Page Start: 273
• Page End: 282
• Publication Date: 2018-07-03
• Subjects: Metastable β-titanium alloy -- cold rolling -- EBSD -- α variant selection -- deformation; Condensed matter -- Periodicals; Physics -- Periodicals; Solid state physics -- Periodicals; Physique -- Périodiques; 530.41
• DOI: 10.1080/09500839.2018.1531155
• Languages: English
• ISSNs: 0950-0839

Abstract

ABSTRACT: The variant selection criteria during β to α phase transformations in a metastable β -titanium alloy (Ti-5553) in the presence of deformation are examined. Two distinct metallurgical states in the β matrix, heavily deformed and fully recrystallized, were obtained from a 90% cold-rolled alloy. The deformed and recrystallized samples were subjected to aging heat treatment for a short time to allow the precipitation of an intragranular α phase. Electron backscattered diffraction was used to assess the α crystallographic variant occurrence in the deformed as well as in the recrystallized β grains. A discrete pole figure analysis revealed that a limited number of variants were evolved in the deformed β grains while there was no variant selection in the recrystallized β matrix. The results suggest that activation of {112}<111> β slip systems determines a strong variant selection in the plastically deformed β matrix.