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Flow behavior and processing map of forging commercial purity titanium powder compact

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Abstract

The flow behavior of forged commercial purity (CP) titanium powder compact was studied by developing a processing map. CP titanium powder was sintered to 94% relative density, then hot compressed in a Gleeble thermal–mechanical simulator at strain rates ranging from 0.001 to 10 s−1 and deformation temperatures ranging from 600 to 800 °C. The hot forging process improved the densification to 98–99.9% and reduced the grain size from 93 to 10 µm by the occurrence of dynamic recrystallization. The fully dynamic recrystallization region is in the range of deformation temperature of 750–800 °C and strain rate of 0.001–0.01 s−1, with a power dissipation efficiency higher than 40%, determined by constructing a processing map and analyzing the volume fraction of dynamic recrystallization. This research provides a guide for powder compact forging of power metallurgy titanium by providing the hot compression parameters, which can lead to an improved microstructure and densification.

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ACKNOWLEDGMENTS

We would like to acknowledge the financial support provided by Cristal Metal Inc. and Thermal Processing Technology Center in USA, the China Postdoctoral Science Foundation under Grant No. 2014M550235, and the Shanghai Postdoctoral Sustentation Fund under Grant No. 14R21410900.

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Authors and Affiliations

  1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xiaoyan Xu, Yuanfei Han & Weijie Lu

  2. Mechanical, Materials & Aerospace Engineering, Thermal Processing Technology Center, Illinois Institute of Technology, Chicago, Illinois, 60616, USA

    Changfu Li & Philip Nash

  3. Research and Development, Cristal Metal Inc., Lockport, Illinois, 60441, USA

    Damien Mangabhai

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  1. Xiaoyan Xu
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  2. Yuanfei Han
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Correspondence to Xiaoyan Xu.

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Xu, X., Han, Y., Li, C. et al. Flow behavior and processing map of forging commercial purity titanium powder compact. Journal of Materials Research 30, 1056–1064 (2015). https://doi.org/10.1557/jmr.2015.84

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