J. Mater. Sci. Technol. ›› 2022, Vol. 110: 227-238.DOI: 10.1016/j.jmst.2021.09.034

• Research Article • Previous Articles     Next Articles

Controlling the mechanical properties and corrosion behavior of biomedical TiZrNb alloys by combining recrystallization and spinodal decomposition

Pengfei Jia, Bohan Chena, Shuguang Liua,c, Bo Lia, Chaoqun Xiaa,b, Xinyu Zhanga,*(), Mingzhen Maa, Riping Liua,*()   

  1. aState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
    bSchool of Materials Science and Engineering, Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin 300130, China
    cBeijing Chunlizhengda Medical Instruments Co., Ltd., Beijing 101112, China
  • Received:2021-08-01 Revised:2021-08-27 Accepted:2021-09-13 Published:2021-11-26 Online:2021-11-26
  • Contact: Xinyu Zhang,Riping Liu
  • About author:riping@ysu.edu.cn (R. Liu).
    * E-mail addresses: xyzhang@ysu.edu.cn (X. Zhang),

Abstract:

Excellent comprehensive mechanical properties and corrosion resistance of TiZrNb equiatomic ratio medium-entropy alloy were obtained through recrystallization and spinodal decomposition. In addition to solid solution strengthening and recrystallization, the excellent mechanical properties can also be attributed to the hindering effect of nanoprecipitation formed via spinodal decomposition on the movement of dislocations. The high atomic arrangement density due to spinodal decomposition reduces the surface energy of the alloy passivation film, thereby increasing the activation energy of dissolution and the bonding energy between atoms, which improve the corrosion resistance and stability of the alloy passivation film. This work provides a new strategy to control the mechanical properties and corrosion resistance by combining recrystallization and spinodal decomposition.

Key words: Titanium, Zirconium, Mechanical properties, Corrosion resistance, Passive films