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Journal of Materials Science

, Volume 54, Issue 16, pp 11279–11291 | Cite as

Enhancement of impact toughness of β-type Ti–Mo alloy by {332}<113> twinning

  • Kai Yao
  • Xiaohua MinEmail author
  • Satoshi Emura
  • Fanqiang Meng
  • Xin Ji
  • Koichi Tsuchiya
Metals & corrosion
  • 225 Downloads

Abstract

The Charpy impact behavior was examined at room temperature on the basis of the metastable β-type Ti-15Mo alloy with {332}<113> twinning-induced plasticity (TWIP) effect. This TWIP alloy exhibited an excellent impact toughness of approximately 250 J/cm2, which was approximately four times higher than those of common titanium alloys. The elongated dimples, fine dimples, and serpentine glide morphology were observed on the fracture surface. The large amounts of twins were formed under impact loading, which induced the adequate plastic deformation to absorb the impact energy. The formation of these dense and fine twins effectively released the stress concentration due to the dynamic microstructure refinement effect, and the abundant cracks along the twin boundaries remarkably increased the crack propagation path. The delayed crack initiation and enhanced crack propagation resistance further consumed the impact energy.

Notes

Acknowledgements

This work was financially supported by the National Key Research and Development Program of China, China (Grant No. 2016YFB1100103), and the National Natural Science Foundation of China, China (Grant Nos. 51471040 and U1610256).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringDalian University of TechnologyDalianPeople’s Republic of China
  2. 2.Research Center for Structural MaterialsNational Institute for Materials ScienceTsukubaJapan

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