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Tailoring the secondary phases and mechanical properties of ODS steel by heat treatment

Journal Article


Abstract


  • The oxide dispersion strengthened (ODS) steel with the nominal composition of Fe–14Cr–2W–0.3Ti–0.2V–0.07Ta–0.3Y 2 O 3 (wt%) was fabricated by mechanical alloying and hot isostatic pressing (HIP). In order to optimize the relative volume fraction of secondary phases, the as-HIPed ODS steel was annealed at 800 °C, 1000 °C, 1200 °C for 5 h, respectively. The microstructures and different secondary phases of the as-HIPed and annealed ODS samples were identified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The tensile properties of all the ODS steels at room temperature were also investigated. The results indicate that annealing is an effective way to control the microstructure and the integral secondary phases. The annealing process promotes the dissolution of M 23 C 6 particles, thus promoting the precipitation of TiC. No obvious coarsening of Y 2 Ti 2 O 7 nanoparticles can be observed during annealing. The tensile results indicate that the annealed ODS sample with the optimized secondary phases and high density possesses the best mechanical properties.

Publication Date


  • 2019

Citation


  • Zhao, Q., Ma, Z., Yu, L., Li, H., Liu, C., Li, C., & Liu, Y. (2019). Tailoring the secondary phases and mechanical properties of ODS steel by heat treatment. Journal of Materials Science and Technology, 35(6), 1064-1073. doi:10.1016/j.jmst.2018.12.008

Scopus Eid


  • 2-s2.0-85062553589

Web Of Science Accession Number


Start Page


  • 1064

End Page


  • 1073

Volume


  • 35

Issue


  • 6

Abstract


  • The oxide dispersion strengthened (ODS) steel with the nominal composition of Fe–14Cr–2W–0.3Ti–0.2V–0.07Ta–0.3Y 2 O 3 (wt%) was fabricated by mechanical alloying and hot isostatic pressing (HIP). In order to optimize the relative volume fraction of secondary phases, the as-HIPed ODS steel was annealed at 800 °C, 1000 °C, 1200 °C for 5 h, respectively. The microstructures and different secondary phases of the as-HIPed and annealed ODS samples were identified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The tensile properties of all the ODS steels at room temperature were also investigated. The results indicate that annealing is an effective way to control the microstructure and the integral secondary phases. The annealing process promotes the dissolution of M 23 C 6 particles, thus promoting the precipitation of TiC. No obvious coarsening of Y 2 Ti 2 O 7 nanoparticles can be observed during annealing. The tensile results indicate that the annealed ODS sample with the optimized secondary phases and high density possesses the best mechanical properties.

Publication Date


  • 2019

Citation


  • Zhao, Q., Ma, Z., Yu, L., Li, H., Liu, C., Li, C., & Liu, Y. (2019). Tailoring the secondary phases and mechanical properties of ODS steel by heat treatment. Journal of Materials Science and Technology, 35(6), 1064-1073. doi:10.1016/j.jmst.2018.12.008

Scopus Eid


  • 2-s2.0-85062553589

Web Of Science Accession Number


Start Page


  • 1064

End Page


  • 1073

Volume


  • 35

Issue


  • 6