Physically-Based Constitutive Modelling of As-Cast CL70 Steel for Hot Deformation

Fei Chen; Xiaodong Zhao; jinyu Ren; Huiqin Chen; Xiaofeng Zhang; Ltd

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자료유형: 학술저널

저자정보: Fei Chen (Taiyuan University of Science and Technology) Xiaodong Zhao (Taiyuan University of Science and Technology) jinyu Ren (Taiyuan University of Science and Technology) Huiqin Chen (Taiyuan University of Science and Technology) Xiaofeng Zhang (Tai Yuan Heavy Industry Transit Equipment Co.) Ltd

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.6

발행연도: 2021.1

수록면: 1,728 - 1,738 (11page)

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In order to conduct numerical simulation of plasticity forming and confirm the processing parameters of heat deformationfor as-cast CL70 steel, the hot deformation behaviors of as-cast CL70 steel were studied by isothermal compression testswhich used a Gleeble-1500D thermal mechanical simulation tester for the deformation temperatures ranging from 1173 to1523 K and the strain rates ranging from 0.001 to 1 s−1. Flow stress curves of the steel were obtained under high temperature. The flow stress constitutive models of the work hardening-dynamical recovery period and dynamical recrystallizationperiod were established for as-cast CL70 steel. In work hardening-dynamic recovery period, the flow stress was predicted byemploying the evolution rule of dislocation density in the constitutive model. In dynamic recrystallization period, the flowstress after the critical strain was predicted by employing the dynamic recrystallization kinetics in the constitutive model. To improve the prediction accuracy of the model, the dynamic recovery coefficient is modified in the traditional physicallybasedconstitutive model. The results indicate that the proposed physically-based constitutive model has high accuracy inpredicting the flow stress under hot deformation for as-cast CL70 steel.

#As-cast CL70 steel · Hot deformation behavior · Constitutive model

참고문헌 (28)

참고문헌 신청

S. H. Su / 2018 / Development of heavy haul freight car wheels in ma steel / J. Anhui Vocat. Coll. Metall. Technol. 28(3):1~4

H. L. Li / 2016 / Infuence of new type wheel steel on wheel/rail wear of heavy haul freight cars / J. China Railway Soc. 38(6):32~37

Babak Shahriari / 2018 / Modeling Deformation Flow Curves and Dynamic Recrystallization of BA-160 Steel During Hot Compression / Metals and Materials International 24(5):955~969

Fei Gao / 2014 / Constitutive Modeling and Dynamic Softening Mechanism During Hot Deformation of an Ultra-Pure 17%Cr Ferritic Stainless Steel Stabilized with Nb / Metals and Materials International 20(5):939~951

A. He / 2015 / A physically-based constitutive model for a nitrogen alloyed ultralow carbon stainless steel / Comput. Mater. Sci. 98:64~69

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