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Hot working characteristics of S32760 super duplex stainless steel

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Abstract

Hot deformation behavior of S32760 super austenitic stainless steel was studied in the temperature range of 950 ∼ 1250 °C and strain rate range of 0.1∼10 s-1 employing Gleeble 3800 equipment. The flow stress was modeled using Arrhenius equation and Zener-Hollomon parameter(Z). The microstructures of the specimens under various conditions were investigated, and dynamic recrystallization of austenite, dynamic recovery of ferrite and phase contents varied with temperature and strain rate. The difference of flow stress between experiment and constitutive equation was explained by the phase contents. Finite element analysis was performed to calculate forging load under the same conditions of compression test using modeled flow stress. It was validated that forging load can be predicted precisely with Arrhenius equation.

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Acknowledgments

This work was supported by the Technology Innovation Program (No.: 10067300, “Development of forming technology for high corrosion resistant and heat-resistant fasteners with a hard forming material.”) funded By the Ministry of Trade, industry & Energy (MI, Korea).

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Authors and Affiliations

  1. Department of Aero-Mechanical Engineering, Jungwon University, Chungbuk, Korea

    Jong hun Kang

  2. Graudate School, Department of Convergence Engineering, Jungwon University, Chungbuk, Korea

    Su jin Heo

  3. Material and Component Center, Gyeonnam Technopark, Gyeongnam, Korea

    Jaeuk Yoo

  4. Korea Conformity Laboratories, Youngnam Regional Center, Busan, Korea

    Yong chul Kwon

Authors
  1. Jong hun Kang
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  2. Su jin Heo
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  3. Jaeuk Yoo
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  4. Yong chul Kwon
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Corresponding author

Correspondence to Yong chul Kwon.

Additional information

Recommended by Associate Editor Dae Cheol Ko

Yongchul Kwon is a Ph.D. in metallurgical and materials engineering, and works at Korea Conformity Laboratories. He studies the optimization of open die forging and closed die forging process by FE-analysis. He is also working mechanical properties evaluation of materials such as steel, aluminum and titanium.

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Kang, J.h., Heo, S.j., Yoo, J. et al. Hot working characteristics of S32760 super duplex stainless steel. J Mech Sci Technol 33, 2633–2640 (2019). https://doi.org/10.1007/s12206-019-0511-y

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  • DOI: https://doi.org/10.1007/s12206-019-0511-y

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