J. Mater. Sci. Technol. ›› 2022, Vol. 104: 183-193.DOI: 10.1016/j.jmst.2021.05.071

• Research Article • Previous Articles     Next Articles

Rolling reduction -dependent deformation mechanisms and tensile properties in a β titanium alloy

Zhaoxin Dua, Qiwei Hea, Ruirun Chenb,*(), Fei Liua, Jingyong Zhangc, Fei Yangd,*(), Xueping Zhaoa, Xiaoming Cuia, Jun Chenge   

  1. aSchool of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
    bNational Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
    cSchool of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008, China
    dWaikato Centre for Advance Materials and Manufacturing, School of Engineering, University of Waikato, Hamilton 3240, New Zealand
    eState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2021-03-30 Revised:2021-05-13 Accepted:2021-05-19 Published:2022-03-30 Online:2021-08-26
  • Contact: Ruirun Chen,Fei Yang
  • About author:fei.yang@waikato.ac.nz (F. Yang).
    * E-mail addresses: ruirunchen@hit.edu.cn (R. Chen),


This work investigated the dependence of deformation mechanisms and mechanical properties on cold rolling reductions of the metastable TB8 titanium alloy. Results shown that the crystal orientation of the matrix changes with the increasing level of reduction, leading to the activation of complex deformation mechanisms in the matrix. When the rolling reduction is 10%, the deformation mechanisms are dominated by dislocations and {332}<113> deformation twins. As the reductions increase to 20%-50%, the secondary deformation twinning (SDT) is triggered in primary deformation twins besides the primary kink band is activated. Meanwhile, the secondary kink bands and {332}<113> twins have be observed in the primary kink bands. When the reduction reaches to 60%, the deformation mechanisms are dominated by dislocations and deformation twins. Furthermore, the matrix refined by crisscrossing among the twins, kink bands and other deformation mechanisms during cold rolling, which shortens the dislocation mean free path and then affects the strength and shape of the alloy. The dynamic Hall-Petch effect and the interaction between multi-scale deformed structures control the work hardening behavior of the alloy.

Key words: TB8 titanium alloy, Deformation mechanisms, Kink band variants, Twinning, Mechanical properties