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Precipitation behavior during high-temperature isothermal compressive deformation of Inconel 718 alloy

Journal Article


Abstract


  • The precipitation behaviors of ����� and �� phases during high-temperature isothermal compressive deformation of Inconel 718 alloy are investigated under the strain rate of 2.2��10���4 s���1. It is found that the precipitation behaviors are tailored by deformation temperatures, and lead to the disparately abnormal deformation characteristics. Under the deformation temperature of 800 ��C, the microstructure is composed of incoherent needle-shaped ����� precipitates at grain boundaries and ultrafine spherical ����� particles within grains, resulting in the exceptional decrease of flow stress with absence of DRX. When deformed at 900 ��C, it becomes needle-shaped �� precipitates at grain boundaries and intragranular disc-shaped ����� precipitates, and the DRX softening degree is lowered consequently.

Publication Date


  • 2016

Citation


  • Zhang, H., Li, C., Liu, Y., Guo, Q., & Li, H. (2016). Precipitation behavior during high-temperature isothermal compressive deformation of Inconel 718 alloy. Materials Science and Engineering A, 677, 515-521. doi:10.1016/j.msea.2016.09.088

Scopus Eid


  • 2-s2.0-84988835556

Start Page


  • 515

End Page


  • 521

Volume


  • 677

Issue


Place Of Publication


Abstract


  • The precipitation behaviors of ����� and �� phases during high-temperature isothermal compressive deformation of Inconel 718 alloy are investigated under the strain rate of 2.2��10���4 s���1. It is found that the precipitation behaviors are tailored by deformation temperatures, and lead to the disparately abnormal deformation characteristics. Under the deformation temperature of 800 ��C, the microstructure is composed of incoherent needle-shaped ����� precipitates at grain boundaries and ultrafine spherical ����� particles within grains, resulting in the exceptional decrease of flow stress with absence of DRX. When deformed at 900 ��C, it becomes needle-shaped �� precipitates at grain boundaries and intragranular disc-shaped ����� precipitates, and the DRX softening degree is lowered consequently.

Publication Date


  • 2016

Citation


  • Zhang, H., Li, C., Liu, Y., Guo, Q., & Li, H. (2016). Precipitation behavior during high-temperature isothermal compressive deformation of Inconel 718 alloy. Materials Science and Engineering A, 677, 515-521. doi:10.1016/j.msea.2016.09.088

Scopus Eid


  • 2-s2.0-84988835556

Start Page


  • 515

End Page


  • 521

Volume


  • 677

Issue


Place Of Publication