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Allowable Ranges of Conventional Forging Parameters Determination for TA15 Ti-Alloy to Obtain Tri-modal Microstructure Under Given Subsequent Heat Treatment

  • Microstructure Evolution During Deformation Processing
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Abstract

Conventional forging combined with subsequent heat treatments is a promising method for TA15 Ti-alloy to obtain a tri-modal microstructure with excellent mechanical properties. In this paper, a prediction model based on an improved back-propagation neural network was adopted to investigate the combinations of deformation temperature and degree at different strain rates and post-forging cooling modes. There exist reasonable combinations under a strain rate of 0.01 s−1 and air cooling or a strain rate of 0.1 s−1 and water quenching. The dependence of final microstructural feature parameters on forging parameters was obtained for the two cases. Targeting ideal tri-modal microstructure feature parameters, the allowable ranges of the forging parameters were obtained in reverse. The results show that the allowable ranges under a strain rate of 0.01 s−1 and air cooling are wider. This provides a guide to obtain a tri-modal microstructure by conventional forging combined with subsequent heat treatment during actual production.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [Grant No. 51675432]; and Project of Science, Technology and Innovation Commission of Shenzhen Municipality [Grant No. JCYJ20170815163436211].

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Authors and Affiliations

  1. Research and Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, China

    Zhichao Sun, Zhikun Yin, Jing Cao & Long Huang

  2. State Key Lab of Solidification Processing, Department of Materials Science and Engineering, Northwestern Polytechnical University, P. O. Box 542, Xi’an, 710072, Shaanxi, China

    Zhichao Sun

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  1. Zhichao Sun
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Correspondence to Zhichao Sun.

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Sun, Z., Yin, Z., Cao, J. et al. Allowable Ranges of Conventional Forging Parameters Determination for TA15 Ti-Alloy to Obtain Tri-modal Microstructure Under Given Subsequent Heat Treatment. JOM 71, 4746–4757 (2019). https://doi.org/10.1007/s11837-019-03837-6

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  • DOI: https://doi.org/10.1007/s11837-019-03837-6

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