The hot flow stress of a typical stainless steel was modeled by the Hollomon equation, a modified form of the Hollomon equation, and another modified form based on the Fields–Backofen equation. The coupled effect of the deformation temperature and strain rate was also taken into account in the proposed formulae by consideration of the Zener–Hollomon parameter or dependency of the constants on temperature. The modified Fields–Backofen equation was found to be appropriate for prediction of flow stress, in which the incorporation of peak strain and consideration of temperature dependencies of the strain rate sensitivity and the stress coefficient were found to be beneficial. Moreover, the simplicity of the proposed model justifies its applicability for expressing hot flow stress characterizing dynamic recrystallization (DRX).
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April 2016
Research-Article
A Simple Constitutive Model for Prediction of Single-Peak Flow Curves Under Hot Working Conditions
Roxana Baktash,
Roxana Baktash
School of Metallurgy and Materials Engineering,
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
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Hamed Mirzadeh
Hamed Mirzadeh
School of Metallurgy and Materials Engineering,
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
e-mail: hmirzadeh@ut.ac.ir
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
e-mail: hmirzadeh@ut.ac.ir
Search for other works by this author on:
Roxana Baktash
School of Metallurgy and Materials Engineering,
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
Hamed Mirzadeh
School of Metallurgy and Materials Engineering,
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
e-mail: hmirzadeh@ut.ac.ir
College of Engineering,
University of Tehran,
Tehran 11155-4563, Iran
e-mail: hmirzadeh@ut.ac.ir
1Corresponding author.
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received October 14, 2015; final manuscript received November 30, 2015; published online January 21, 2016. Assoc. Editor: Vadim V. Silberschmidt.
J. Eng. Mater. Technol. Apr 2016, 138(2): 021004 (5 pages)
Published Online: January 21, 2016
Article history
Received:
October 14, 2015
Revised:
November 30, 2015
Citation
Baktash, R., and Mirzadeh, H. (January 21, 2016). "A Simple Constitutive Model for Prediction of Single-Peak Flow Curves Under Hot Working Conditions." ASME. J. Eng. Mater. Technol. April 2016; 138(2): 021004. https://doi.org/10.1115/1.4032153
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