Hot deformation behaviors of a 9Cr oxide dispersion-strengthened steel and its microstructure characterization
来源期刊：International Journal of Minerals Metallurgy and Materials2019年第5期
论文作者：Yu Shao Li-ming Yu Yong-chang Liu Zong-qing Ma Hui-jun Li Jie-feng Wu
文章页码：597 - 610
摘 要：The hot deformation behaviors of a 9 Cr oxide dispersion-strengthened（9 Cr-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 9 Cr-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 9 Cr-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.
Yu Shao1，Li-ming Yu1，Yong-chang Liu1，Zong-qing Ma1，Hui-jun Li1，Jie-feng Wu2
1. State Key Lab of Hydraulic Engineering Simulation and Safety, Tianjin Key Lab of Composite and Functional Materials, Tianjin University2. Institute of Plasma Physics, Chinese Academy of Sciences
摘 要：The hot deformation behaviors of a 9 Cr oxide dispersion-strengthened（9 Cr-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 9 Cr-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 9 Cr-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.
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