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Deformation behavior and processing maps of Ni3Al-based superalloy during isothermal hot compression

Journal Article


Abstract


  • To study the hot deformation behavior of Ni3Al-based alloy, hot compression tests were conducted in the temperature range of 1050–1250 °C with the strain rates from 0.01 to 10 s−1. With the increase in deformation temperature and the decrease in strain rate, flow stress of the Ni3Al-based alloy would be decreased. Based on the obtained constitutive equation, the calculated values of peak flow stress are in good agreement with the experimental ones, and the activation deformation energy is determined as 802.71 kJ/mol. Moreover, by dynamic material model (DMM), processing maps of the hot-deformed Ni3Al-based alloys are established. It is indicated that the optimum processing parameters for the studied alloy correspond to deformation temperature of 1250 °C and strain rates from 0.01 to 0.1 s−1. Specimens deformed under the optimum processing conditions exhibit fine and uniform grains, which is a typical dynamic recrystallization (DRX) microstructure. The DRX degree could be effectively enhanced with the increase of deformation temperature and the decrease of strain rate.

Publication Date


  • 2017

Citation


  • Wu, Y., Liu, Y., Li, C., Xia, X., Huang, Y., Li, H., & Wang, H. (2017). Deformation behavior and processing maps of Ni3Al-based superalloy during isothermal hot compression. Journal of Alloys and Compounds, 712, 687-695. doi:10.1016/j.jallcom.2017.04.116

Scopus Eid


  • 2-s2.0-85017654413

Web Of Science Accession Number


Start Page


  • 687

End Page


  • 695

Volume


  • 712

Abstract


  • To study the hot deformation behavior of Ni3Al-based alloy, hot compression tests were conducted in the temperature range of 1050–1250 °C with the strain rates from 0.01 to 10 s−1. With the increase in deformation temperature and the decrease in strain rate, flow stress of the Ni3Al-based alloy would be decreased. Based on the obtained constitutive equation, the calculated values of peak flow stress are in good agreement with the experimental ones, and the activation deformation energy is determined as 802.71 kJ/mol. Moreover, by dynamic material model (DMM), processing maps of the hot-deformed Ni3Al-based alloys are established. It is indicated that the optimum processing parameters for the studied alloy correspond to deformation temperature of 1250 °C and strain rates from 0.01 to 0.1 s−1. Specimens deformed under the optimum processing conditions exhibit fine and uniform grains, which is a typical dynamic recrystallization (DRX) microstructure. The DRX degree could be effectively enhanced with the increase of deformation temperature and the decrease of strain rate.

Publication Date


  • 2017

Citation


  • Wu, Y., Liu, Y., Li, C., Xia, X., Huang, Y., Li, H., & Wang, H. (2017). Deformation behavior and processing maps of Ni3Al-based superalloy during isothermal hot compression. Journal of Alloys and Compounds, 712, 687-695. doi:10.1016/j.jallcom.2017.04.116

Scopus Eid


  • 2-s2.0-85017654413

Web Of Science Accession Number


Start Page


  • 687

End Page


  • 695

Volume


  • 712