In Situ Notched Tensile Fracture of TC21 Alloy with Different Microstructures

  • Hui Shao
  • Di Shan
  • Kaixuan Wang
  • Yongfeng Ding
  • Yunjin Lai
  • Guojun Zhang
  • Yongqing Zhao
Conference paper

Abstract

In order to investigate the notched toughness of TC21 alloy, different types of microstructures (lamellar, basketweave and equiaxed microstructure) prepared by different forging and heat treatment processes were studied. The microstructure was observed through the in situ SEM tensile technology. The cracks were found initiated along β grain boundary, lath α/β interface and equiaxed α/β interface. The crack easily propagate along the slip damage in the plastic area of the crack tip. The notched toughness of the TC21 alloy with the lamellar microstructure was found to be the highest among the three ones.

Keywords

Titanium alloy Microstructure In situ Notched toughness 

Notes

Acknowledgements

The authors would like to acknowledge the support of the this work was supported by the National Natural Science Foundation (No. 51501150) and the program of Science Research Foundation and Scientific Research Foundation (No. 2014cx001) for Doctoral teacher from Xi’an University of Technology.

References

  1. 1.
    Y.Q. Zhao, H. L. Qu, L. Feng, Research on high Strength, high toughness and high damage-tolerant titanium Alloy-TC21, Tita. Indu. Pro (China). 21(1) (2004) 22–24.Google Scholar
  2. 2.
    H. Shao, Y.Q. Zhao, P. Ge, W.D. Zeng, Effects of Different microstructure types on the strength and plasticity of TC21 Alloy, Rare. Metal. Mat. Eng (China). 42(4) (2013) 845–848.Google Scholar
  3. 3.
    H. Shao, Y.Q. Zhao, P. Ge, W.D. Zeng, Influence of cooling rate and aging on the lamellar microstructure and fractography of TC21 titanium alloy, Metallogr. Microstruct. Anal. 2(1) (2013) 35–41.Google Scholar
  4. 4.
    H. Shao, Y.Q. Zhao, P. Ge, W.D. Zeng, Crack initiation and mechanical properties of TC21 titanium alloy with equiaxed microstructure, Mat. Sci. Eng. A. 586 (2013) 215–222.Google Scholar
  5. 5.
    W.C. Chung, L.W. Tsay, C. Chen, Microstructure and notch properties of heat-treated Ti-4.5 Al-3V-2Mo-2Fe laser welds, Mater. Trans. 50(3) (2009) 544–550.Google Scholar
  6. 6.
    R.K. Gupta, C. Mathew, P. Ramkumar, Strain hardening in aerospace alloys, F. A. E. (2015) 1–11.Google Scholar
  7. 7.
    R. Qu, P. Zhang, Z. Zhang, Notch effect of materials: strengthening or weakening, J. Mater. Sci. Technol. 30(6) (2014) 599–608.Google Scholar
  8. 8.
    D. Banerjee, J.C. Williams, Microstructure and slip character in titanium alloys, Defence. Sci. J. 36(2) (2014) 191–206.Google Scholar
  9. 9.
    H. Shao, Y.Q. Zhao, P. Ge, W.D. Zeng, In-situ SEM observations of tensile deformation of the lamellar microstructure in TC21 titanium alloy, Mat. Sci. Eng. A. 559 (2013) 515–519.Google Scholar
  10. 10.
    D. Bhattacharyya, G.B. Viswanathan, H.L. Fraser, Crystallographic and morphological relationships between β phase and the Widmanstätten and allotriomorphic α phase at special β grain boundaries in an α/β titanium alloy, Acta. Mater. 55(20) (2007) 6765–6778.Google Scholar
  11. 11.
    V. Sinha, M.J. Mills, J.C. Williams, Observations on the faceted initiation site in the dwell-fatigue tested Ti-6242 alloy: crystallographic orientation and size effects, Metall. Mater. Trans. A. 37(5) (2006) 1507–1518.Google Scholar
  12. 12.
    C.J. Szczepanski, S.K. Jha, P.A. Shade, et al, Demonstration of an in situ microscale fatigue testing technique on a titanium alloy, Int. J. Fatigue. 57 (2013) 131–139.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Hui Shao
    • 1
  • Di Shan
    • 1
  • Kaixuan Wang
    • 2
  • Yongfeng Ding
    • 2
  • Yunjin Lai
    • 2
  • Guojun Zhang
    • 1
  • Yongqing Zhao
    • 3
  1. 1.Xi’an University of TechnologyXi’anPeople’s Republic of China
  2. 2.Western Superconducting Technologies Co., Ltd.Xi’anPeople’s Republic of China
  3. 3.Northwest Institute for Non-Ferrous Metal ResearchXi’anPeople’s Republic of China

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