Determination of Flow Stress Using Parametric Linearity Relationship of Arrhenius Power Law

作者：Maheshwari Amit Kumar^*

来源：High Temperature Materials and Processes, 2014, 33(1): 13-19.

DOI：10.1515/htmp-2013-0011

• material modeling
• viscoplastic flow
• strain
• strain rate
• thermo-mechanical processing

In this study, hot workability aspect for modeling the flow stress at specified deformation level is investigated. The proposed model contains the basic parametric relationship of Arrhenius power law. The developed mathematical model is validated on Al 2024 alloy to check its feasibility over a wide range of strain rate, strain, and temperature. When compared with Johnson-Cook (JC) model, it is found to give a more perceptible experimental output by limited evaluation of arbitrary constants. The proposed model uses the input from hot compression test without the necessacity to go to torsion experiment. This proves its supremacy over JC model which require both the inputs. It also limits the number of constants, so produces a forwarding mark to N.S. Babu Model which needs 48 numbers of constants to define the constitutive aspect of deformation.

• 出版日期2014-2