Constitutive modelling of the flow behaviour of a β titanium alloy at high strain rates and elevated temperatures using the Johnson–Cook and modified Zerilli–Armstrong models

Hongyi Zhan; Gui Wang; Damon Kent; Matthew S Dargusch

doi:10.1016/j.msea.2014.06.030

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Constitutive modelling of the flow behaviour of a β titanium alloy at high strain rates and elevated temperatures using the Johnson–Cook and modified Zerilli–Armstrong models

Journal article

Open access

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Constitutive modelling of the flow behaviour of a β titanium alloy at high strain rates and elevated temperatures using the Johnson–Cook and modified Zerilli–Armstrong models

Hongyi Zhan, Gui Wang, Damon Kent and Matthew S Dargusch

Materials Science & Engineering A, Vol.612, pp.71-79

2014

DOI: https://doi.org/10.1016/j.msea.2014.06.030

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Abstract

Materials Engineering

Mechanical Engineering

β titanium alloys

high strain rate deformation

Johnson-Cook model

modified Zerilli-Armstrong model

The objectives of this work are to characterize the flow behaviour of the Ti-6Cr-5Mo-5V-4Al (Ti6554) alloy at high strain rates and elevated temperatures using the Johnson-Cook (JC) model and a modified Zerilli-Armstrong (ZA) model, and to make a comparative study on the predictability of these two models. The stress-strain data from Split Hopkinson Pressure Bar (SHPB) tests over a wide range of temperatures (293-1173 K) and strain rates (103-104 s-1) were employed to fit parameters for the JC and the modified ZA models. It is observed that both the JC and the modified ZA models have good capacities of describing the flow behaviour of the Ti6554 alloy at high strain rates and elevated temperatures in terms of the average absolute error. The modified ZA model is able to capture the strain-hardening behaviour of the Ti6554 alloy better as it incorporates the coupling effects of strain and temperature. However, dynamic recovery or dynamic recrystallization that may happen at elevated temperatures should be taken into consideration when selecting data set for parameters fitting for the modified ZA model. Also the modified ZA model requires more stress-strain data for the parameters fitting than the JC model.

Details

Title: Constitutive modelling of the flow behaviour of a β titanium alloy at high strain rates and elevated temperatures using the Johnson–Cook and modified Zerilli–Armstrong models
Authors: Hongyi Zhan (Author) - University of Queensland
Gui Wang (Author) - University of Queensland
Damon Kent (Author) - University of Queensland
Matthew S Dargusch (Author) - The University of Queensland
Publication details: Materials Science & Engineering A, Vol.612, pp.71-79
Publisher: Elsevier BV
Date published: 2014
DOI: 10.1016/j.msea.2014.06.030
ISSN: 0921-5093
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99448648702621
Output Type: Journal article

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Collaboration types: Industry collaboration; Domestic collaboration
Web Of Science research areas: Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Nanoscience & Nanotechnology