Deformation induced FCC lamellae and their interaction in commercial pure Ti

• DOI: 10.1016/j.scriptamat.2018.11.037
• Publication Date: 2018-11-27T11:10:58Z
• Authors: Xiaodong Zheng; Mingyu Gong; Ting Xiong; Hualong Ge; Lixin Yang; Yangtao Zhou; Shijian Zheng; Jian Wang; Xiuliang Ma
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Titanium with hexagonal close-packed (hcp) structure can undergo phase transformation to face-centered cubic (fcc) structure under mechanical straining at room temperature. In this work, we identified two orientation relationships (ORs) between fcc phase and hcp matrix in commercial pure Ti, i.e., P-type OR [ 1 ¯ 2 1 ¯ 0]hcp||[1 1 ¯ 0]fcc and (10 1 ¯ 0)hcp||(110)fcc, and B-type OR [ 1 ¯ 2 1 ¯ 0]hcp||[1 1 ¯ 0]fcc and (0001)hcp||( 1 ¯ 1 ¯ 1)fcc. The P-type interface is flat while the B-type interface is stepped, which are ascribed to the pure-shuffle mechanism and the partial gliding mechanism, respectively. Most intriguingly, the B-type fcc lamella can penetrate the P-type fcc lamella through gliding of the dislocation with Burgers vector ½[110] on (001)fcc plane.