J. Mater. Sci. Technol. ›› 2013, Vol. 29 ›› Issue (3): 273-278.DOI: 10.1016/j.jmst.2012.12.004

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On Temperature and Strain Rate Dependent Strain Localization Behavior in Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Alloy

B. Zhang1), L.M. Lei2), X.L. Jiang1,3), Z.M. Song3), X. Huang2), G.P. Zhang3)   

  1. 1) Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China
    2) Titanium Alloys Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China
    3) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2012-02-17 Revised:2012-04-29 Online:2013-03-30 Published:2013-03-19
  • Contact: G.P. Zhang
  • Supported by:

    National Basic Research Program of China (No. 2007CB613803), the National Natural Science Foundation of China (NSFC, No. 51071158), and partially supported by the NSFC (No. 51171045).

Abstract:

Deformation behaviors of Tie6.5Al-3.5Mo-1.5Zr-0.3Si alloys with α/β lamellar structure were investigated systematically at different temperatures from room temperature to 950 oC and different strain rates. Results reveal that when the deformation temperature is higher than a critical temperature of 600 oC, an evident transition of deformation behavior from localized shear banding to α/β  lamella kinking, flow softening and temperature/strain rate-dependent peak flow stress occurred in the alloy. The critical conditions for the occurrence of internal cracking and strain localization behavior associated with temperature and strain rate were determined.

Key words: Titanium alloy, Hot working, Temperature, Strain rate, Shear band