Study on Constitutive Models of 22Cr–5Ni–3Mo–N High Alloy Steel for High Temperature Deformation

Chin J Mater Res

2011, Vol. 25

Issue (6): 591-596 DOI:

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Study on Constitutive Models of 22Cr–5Ni–3Mo–N High Alloy Steel for High Temperature Deformation

ZOU Dening¹, CHEN Zhiyu¹, HAN Ying², FAN Guangwei³, ZHANG Wei³

1.School of Metallurgy and Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055
2.State Key Laboratory for Mechanical Behavior of Materials; Xi an Jiaotong University, Xi’an 710049
3.Technology Center of Taiyuan Iron and Steel Group Co.Ltd, Taiyuan 030003

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ZOU Dening CHEN Zhiyu HAN Ying FAN Guangwei ZHANG Wei. Study on Constitutive Models of 22Cr–5Ni–3Mo–N High Alloy Steel for High Temperature Deformation. Chin J Mater Res, 2011, 25(6): 591-596.

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Abstract High temperature compression tests were performed on 22Cr–5Ni–3Mo–N high alloy steel cast slab in the temperature range of 900–1200 ! and the strain rate range of 0.1–50 s−1 by Gleeble–3800 thermomechanical simulator machine. The regulations of true stress–true strain cures were analyzed at different working conditions. Based on the experimental data, the hyperbolic sine, the exponential and the power constitutive models were established describing the high temperature flow peak stress of the steel. The peak stresses were predicted by the constitutive equations under the corresponding experimental conditions. The accuracy and reliability of the equations were evaluated. The results show that when the peak stress is predicted by the hyperbolic sine model, the consistency between the experimental and
calculation values is the best. The correlation coefficient (R) is 0.998, and the average value of relatively errors is 4.9%. These will provide a basis of theory for selecting plastic deformation constitutive model of the steel at high temperature.

Key words: metallic materials 22Cr–5Ni–3Mo–N high alloy steel flow stress curves constitutive equation peak stress

Received: 13 August 2010

ZTFLH:

TG133

Fund:

Supported by Scientific Research Program Funded by Shaanxi Provincial Education Department No.2010JC10, State Key Laboratory for Mechanical Behavior of Materials No.20111212 and Produce–Learn–Research Cooperation Funded by Yulin City in Shaanxi Province No.K04102.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2011/V25/I6/591

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