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Effect of the Rate and Temperature of Hot Deformation on Strain Resistance of Duplex Stainless Steel

  • THERMAL AND THERMOMECHANICAL TREATMENT
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Metal Science and Heat Treatment Aims and scope

The effect of the temperature and rate of hot deformation on the structure and strain resistance of duplex stainless steel DSS 2205 is considered. Tests for hot compression of specimens are conducted at a temperature of 1223 – 1473 K and deformation rate 0.01 – 30 sec–1 to a degree of 0.4 and 0.8. Maps of deformation mechanisms are plotted. It is shown that the strain resistance decreases after attaining a maximum value in the flow curve, and the flow stress increases with decrease of the temperature and increase of the rate of the deformation. The activation energy of the hot deformation is shown to vary in accordance with the partitioning of strain between the two phases (ferrite and austenite) in the structure of the steel. The rate and the temperature of the deformation affect the deformability of the duplex steel considerably. Continuous dynamic recrystallization of ferrite is activated strongly in the range of flow stability. The range of flow instability is characterized by weak continuous dynamic recrystallization in the ferrite and discontinuous dynamic recrystallization in the austenite.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China

    Zhichao Li, Jing Wu, Qiannan Li, Xinjing Li, Lianfang He & Huiping Li

  2. School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, China

    Zhichao Li

  3. Mengshan Steel Structure Engineering Co., Ltd, Jining, Shandong, China

    Zhichao Li

  4. School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, China

    Zhihui Cai

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  1. Zhichao Li
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  2. Jing Wu
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Correspondence to Zhichao Li.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 3 – 12, February, 2023.

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Li, Z., Wu, J., Li, Q. et al. Effect of the Rate and Temperature of Hot Deformation on Strain Resistance of Duplex Stainless Steel. Met Sci Heat Treat 65, 65–73 (2023). https://doi.org/10.1007/s11041-023-00893-3

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  • DOI: https://doi.org/10.1007/s11041-023-00893-3

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