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Hot deformation behaviors of a 9Cr oxide dispersion-strengthened steel and its microstructure characterization

Journal Article


Abstract


  • The hot deformation behaviors of a 9Cr oxide dispersion-strengthened (9Cr-ODS) steel fabricated by mechanical alloying and hot isostatic pressing (HIP) were investigated. Hot compression deformation experiments were conducted on a Gleeble 3500 simulator in a temperature range of 950–1100°C and strain rate range of 0.001–1 s−1. The constitutive equation that can accurately describe the relationship between the rheological stress and the strain rate of the 9Cr-ODS steel was established, and the deformation activation energy was calculated as 780.817 kJ/mol according to the data obtained. The processing maps of 9Cr-ODS in the strain range of 0.1–0.6 were also developed. The results show that the region with high power dissipation efficiency corresponds to a completely recrystallized structure. The optimal processing conditions were determined as a temperature range of 1000–1050°C with strain rate between 0.003 and 0.01 s−1.

Publication Date


  • 2019

Citation


  • Shao, Y., Yu, L. M., Liu, Y. C., Ma, Z. Q., Li, H. J., & Wu, J. F. (2019). Hot deformation behaviors of a 9Cr oxide dispersion-strengthened steel and its microstructure characterization. International Journal of Minerals, Metallurgy and Materials, 26(5), 597-610. doi:10.1007/s12613-019-1768-y

Scopus Eid


  • 2-s2.0-85065248021

Web Of Science Accession Number


Start Page


  • 597

End Page


  • 610

Volume


  • 26

Issue


  • 5

Abstract


  • The hot deformation behaviors of a 9Cr oxide dispersion-strengthened (9Cr-ODS) steel fabricated by mechanical alloying and hot isostatic pressing (HIP) were investigated. Hot compression deformation experiments were conducted on a Gleeble 3500 simulator in a temperature range of 950–1100°C and strain rate range of 0.001–1 s−1. The constitutive equation that can accurately describe the relationship between the rheological stress and the strain rate of the 9Cr-ODS steel was established, and the deformation activation energy was calculated as 780.817 kJ/mol according to the data obtained. The processing maps of 9Cr-ODS in the strain range of 0.1–0.6 were also developed. The results show that the region with high power dissipation efficiency corresponds to a completely recrystallized structure. The optimal processing conditions were determined as a temperature range of 1000–1050°C with strain rate between 0.003 and 0.01 s−1.

Publication Date


  • 2019

Citation


  • Shao, Y., Yu, L. M., Liu, Y. C., Ma, Z. Q., Li, H. J., & Wu, J. F. (2019). Hot deformation behaviors of a 9Cr oxide dispersion-strengthened steel and its microstructure characterization. International Journal of Minerals, Metallurgy and Materials, 26(5), 597-610. doi:10.1007/s12613-019-1768-y

Scopus Eid


  • 2-s2.0-85065248021

Web Of Science Accession Number


Start Page


  • 597

End Page


  • 610

Volume


  • 26

Issue


  • 5