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Nucleation mechanisms of dynamic recrystallization for G3 alloy during hot compression

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Abstract

Dynamic recrystallization (DRX) mechanisms of a nickel-based corrosion-resistant alloy, G3, were investigated by hot compression tests with temperatures from 1050 to 1200 °C and strain rates from 0.1 to 5.0 s−1. Deformation microstructure was observed at the strain from 0.05 to 0.75 by electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). Work hardening rate curves were calculated to analyze the effect of deformation parameters on the nucleation process. Results indicate that strain-induced grain boundary migration is the principal mechanism of DRX. Large annealing twins promote nucleation by accumulating dislocations and fragmenting into cell blocks. Continuous dynamic recrystallization is also detected to be an effective supplement mechanism, especially at low temperature and high strain rate.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No. 51301085) and the Doctoral Scientific Research Foundation of Nanjing Institute of Technology (No. YKJ201305).

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Authors and Affiliations

  1. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing, 211167, China

    Jue Wang

  2. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing, 211167, China

    Jue Wang

  3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Jian-Xin Dong & Mai-Cang Zhang

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  1. Jue Wang
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  2. Jian-Xin Dong
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  3. Mai-Cang Zhang
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Correspondence to Jue Wang.

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Wang, J., Dong, JX. & Zhang, MC. Nucleation mechanisms of dynamic recrystallization for G3 alloy during hot compression. Rare Met. 35, 543–550 (2016). https://doi.org/10.1007/s12598-016-0718-3

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  • DOI: https://doi.org/10.1007/s12598-016-0718-3

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