J. Mater. Sci. Technol. ›› 2020, Vol. 52: 235-242.DOI: 10.1016/j.jmst.2020.02.064

• Research Article • Previous Articles    

The influence of solute atom ordering on the deformation behavior of hexagonal close packed Ti-Al alloys

Hao Wua,*(), Yunlei Xua, Zhihao Wangb, Zhenhua Liuc, Qinggang Lid, Jinkai Lia,*(), Junyan Wua,*()   

  1. a School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
    b School of Material Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
    c Technical Division, Sinomach Foundry and Metal Forming Co., Ltd., Jinan 250306, China
    d Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, Jinan 250022, China
  • Received:2020-02-02 Revised:2020-02-08 Accepted:2020-02-23 Published:2020-09-15 Online:2020-09-18
  • Contact: Hao Wu,Jinkai Li,Junyan Wu


A framework of compositionally graded Ti-Al alloys was proposed to elucidate the Al alloying dependent deformation mechanism at room temperature. Slip trace analysis demonstrated low-alloyed Ti-Al model materials were plastically deformed by prismatic slip, pyramidal slip, stacking faults, and deformation twins. Increasing Al concentration promoted chemical ordering, thus suppressing the dislocation motion and deformation twinning. The mechanism behind such a kind of composition-mediated deformation physics was discussed. Our findings are expected to be applicable in the design of next-generation high-performance structural materials through the tailoring of the chemical ordering of solute atoms in substitutional solid solution.

Key words: Titanium alloys, Diffusion, Alloying, Electron microscopy