A new double twinning mode in a cold-rolled Zr alloy. (2nd January 2019)

• Record Type: Journal Article
• Authors: An, Xinglong; Ni, Song; Song, Min
• Is Part Of: Philosophical magazine letters. Volume 99:Number 1(2019)
• Page Start: 21
• Page End: 28
• Publication Date: 2019-01-02
• Subjects: Double twinning -- Zirconium alloys -- cold rolling -- transmission electron microscopy; Condensed matter -- Periodicals; Physics -- Periodicals; Solid state physics -- Periodicals; Physique -- Périodiques; 530.41
• DOI: 10.1080/09500839.2019.1612107
• Languages: English
• ISSNs: 0950-0839

Abstract

ABSTRACT: A new double twinning mode { 10 1 ¯ 2 } − { 10 1 ¯ 1 } characterised by a 38° ⟨ 1 2 ¯ 10 ⟩ twin/matrix misorientation was observed in a cold-rolled Zr70 Ti30 alloy using transmission electron microscope (TEM). The P-Py, P-B and B-Py interfaces coexist in double twins and were identified at the atomic scale. The presence of a large number of steps (P-Py and P-B interfaces) along the twin boundaries led to the curvature and deviation of the double twin boundaries from the twinning planes in macroscale. It is proposed that the temperature increase during multi-pass rolling process activated the { 10 1 ¯ 1 } twinning in { 10 1 ¯ 2 } primary twins.