Revealing the surface nano-enhancing mechanism of α-titanium alloy by microstructure evolution

• Published in: Materials letters Vol. 160; pp. 51 - 54
• Main Authors: Zhao, Xiaohui, Fan, Yanjun, Wang, Huiyuan, Liu, Yu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2015
• Subjects: Crystal structure; Deformation; Evolution; Microstructure; Nanocrystalline; Nanocrystals; Nanostructure; Orientation; Recrystallization; Skin pass rolling; Surface; Twinning; Microstructure; Orientation; Recrystallization; Nanocrystalline; Surface
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2015.07.067

The α-titanium alloy was treated through ultrasonic surface rolling process at room temperature. Nanocrystalline was obtained in specimen surface. It is newly discovered that a fixed crystal orientation of (120) exists between nanocrystalline zone and matrix zone. The nano-enhancing mechanism of ultrasonic surface rolling process can be explained by the change of twins and crystal orientation. The compress twinning {10−12}〈−1011〉 of α-titanium dominates the deformation during rolling and impacting. •A new finding that a fixed crystal orientation of (120) exists between nanocrystalline zone and the matrix zone.•The nano-enhancing mechanism of ultrasonic surface rolling process was explained by the change of twins and crystal orientation.