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Study on Tensile Deformation Behavior of TC21 Titanium Alloy

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Abstract

To investigate the tensile deformation behavior of TC21 titanium alloy wires, the isothermal tensile deformation tests were conducted by a Geeble-1500D simulator in the temperature range of 720-880 °C and strain rates of 0.01-10 s−1. The in situ tensile deformation behavior has been studied by SEM SURPA40. The stress–strain curves indicate that the flow stress has shown an inverse relationship with temperature and a direct relationship with strain rate. The flow stress immediately reached the peak value and, then, gradually decreased due to the dynamic softening induced by dynamic recovery and dynamic recrystallization. According to the hot processing maps, the temperatures ranging from 720 to 760 °C (corresponding to the strain rates of 0.01-0.032 s−1) and 800-840 °C (corresponding to the strain rates of 0.01-0.056 s−1) are suitable for processing. The in situ tensile results reveal that the cracks initiated at the pre-fabricated defects with the concentrated stress and mainly propagated in the transgranular mode.

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Acknowledgments

This work was supported by Guizhou science and technology fund project (Contract Number [2018]1027); Engineering research center project from Guizhou provincial education department (Contract Number [2017]016); Guizhou major special projects (Contract Number [2014]6013); Science and technology talent growth project from Guizhou provincial education department (Contract Number [2017]238).

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Authors and Affiliations

  1. College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, People’s Republic of China

    Song Zhang, Yilong Liang, Qifan Xia & Meigui Ou

  2. Key Laboratory for Material Structure and Strength of Guizhou Province, Guiyang, 550025, People’s Republic of China

    Song Zhang, Yilong Liang, Qifan Xia & Meigui Ou

  3. National Local Co-construction Engineering Laboratory for High Performance Metal Structure Material and Manufacture Technology, Guiyang, 550025, People’s Republic of China

    Song Zhang, Yilong Liang, Qifan Xia & Meigui Ou

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  1. Song Zhang
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Correspondence to Meigui Ou.

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Zhang, S., Liang, Y., Xia, Q. et al. Study on Tensile Deformation Behavior of TC21 Titanium Alloy. J. of Materi Eng and Perform 28, 1581–1590 (2019). https://doi.org/10.1007/s11665-019-03901-x

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  • DOI: https://doi.org/10.1007/s11665-019-03901-x

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