Abstract
To seek a fundamental understanding for further improving the Ti-6Al-4 V alloy utilization of cross-wedge rolling (CWR) and the comprehensive mechanical properties of shaft parts, the effect of the CWR processing parameters on the microstructure evolution of Ti-6Al-4 V alloy shaft preform is studied in this paper. An Arrhenius-type microstructure evolution model was employed and implemented into the finite element software DEFORM-3D. The average grain size and dynamic re-crystallization (DRX) volume fraction distribution in the α + β two-phase region and the β single phase region under different rolling temperature, roller rotating speed, and area reduction were analyzed, respectively. It is found that the microstructure evolution of Ti-6Al-4 V alloy is affected by CWR processing parameters. Meanwhile, the corresponding CWR metallographic experiments were conducted to verify the reliability of the FE-simulation results. The difference in average grain size in the β phase region between simulation and experimental is ranged from 5.77 to 18.56%. However, the agreement of the process parameter effect on dynamic recrystallization in the α + β two-phase region is reasonably well. The evenly distributed microstructure can be found as the area reduction rate of 50%, rolling temperature of 950℃ and the speed of 5 r⋅min−1 were employed. In addition, the higher tensile strength of Ti-6Al-4 V alloy shaft preform increased by 18.57% and the plasticity enhanced significantly due to smaller grain size and α + β two-phase microstructure can be obtained by CWR under optimized processing conditions.
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Funding
We gratefully acknowledge that the project was supported by National Natural Science Foundation of P.R. China (Grant No. 51975301) and by Ningbo Municipal Science and Technology Innovation Major Project (Grant No. 2020Z110). The work was also sponsored by K. C. Wong Magna Fund in Ningbo University.
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The corresponding authors Baoshou Sun and Xing Chen were responsible for determining the suitable structure and contents of this paper. Chen Xing was also responsible for reviewing and editing this paper. Jiayao Yuan was responsible for writing this paper and analyzing all the obtained experimental data. Zhilong Zhao was responsible for all the simulation results. Xuedao Shu was responsible for conceptualization, funding acquisition, and project administration.
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Yuan, J., Chen, X., Zhao, Z. et al. Numerical and experimental study on microstructure evolution of Ti-6Al-4 V alloy shaft preform in cross-wedge rolling process. Int J Adv Manuf Technol 119, 3785–3801 (2022). https://doi.org/10.1007/s00170-021-08440-1
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DOI: https://doi.org/10.1007/s00170-021-08440-1