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Ductile Ti–Ni Alloys With an Equiaxed Microstructure Designed by Tuning the Precipitation Pathway of Ti2Ni

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Abstract

The abnormal precipitation of Ti2Ni arising from compositional inhomogeneity leads to the formation of α-laths in powder metallurgy Ti–Ni alloys. This exacerbates the detrimental effect of eutectoid on ductility. Herein, we have developed a uniform Ni-coated Ti powder to obtain rapid compositional homogeneity during sintering process. This rectified the abnormal eutectoid reaction pathway, enabling us to obtain fully equiaxed α-Ti grains. Consequently, the equiaxed microstructure effectively counteracted the degradation in ductility caused by brittle eutectoid.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Nos. 52074254, 52174349 and 52204377), the Key Projects of International Cooperation (No. 122111KYSB20200034), the CAS Project for Young Scientists in Basic Research (YSBR-025), and the Project of Key Laboratory of Science and Technology on Particle Materials (No. CXJJ-22S043), Chinese Academy of Sciences. The authors are grateful to R.D.K. Misra for careful reading, review, and editing of the study described here.

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Authors and Affiliations

  1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    X. M. Gan, S. F. Li, S. X. Wang, C. Q. Hu & Y. F. Yang

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    X. M. Gan, S. F. Li, S. X. Wang, C. Q. Hu & Y. F. Yang

  3. Department of Metallurgical, Materials and Biomedical Engineering, University of Texas, El Paso, TX, 79968, USA

    R. D. K. Misra

  4. Key Laboratory of Science and Technology on Particle Materials, Chinese Academy of Sciences, Beijing, 100190, China

    Y. F. Yang

  5. Joining and Welding Research Institute, Osaka University, Osaka, Japan

    K. Kondoh

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  1. X. M. Gan
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  2. S. F. Li
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  3. S. X. Wang
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  4. R. D. K. Misra
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  5. K. Kondoh
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  6. C. Q. Hu
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  7. Y. F. Yang
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Gan, X.M., Li, S.F., Wang, S.X. et al. Ductile Ti–Ni Alloys With an Equiaxed Microstructure Designed by Tuning the Precipitation Pathway of Ti2Ni. Metall Mater Trans A 54, 4208–4214 (2023). https://doi.org/10.1007/s11661-023-07179-6

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  • DOI: https://doi.org/10.1007/s11661-023-07179-6

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