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Linear analysis of parameters in Arrhenius model for Ti-6Al-4V at superplastic forming

Junzhou Yang (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Jianjun Wu (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Qianwen Zhang (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Yinxiang Ren (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Han Ruolan (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Kaiwei Wang (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 28 December 2020

Issue publication date: 9 July 2021

219

Abstract

Purpose

With the discussion on the linear relationship of determined material parameters, this study aims to propose a new method to analyze the deformation mechanism.

Design/methodology/approach

A modified constitutive model based on the hyperbolic sine Arrhenius equation has been established, which is applied to describe the flow behavior of Ti-6Al-4V alloy during the superplastic forming (SPF).

Findings

The modified constitutive model in this work has a good ability to describe the flow behavior for Ti-6Al-4V in SPF. Besides, a deformation map of titanium material is obtained based on the parameters. As the supplement, finite element models of high-temperature tensile tests are carried out as the application of the constitutive model.

Originality/value

The relationship between constitutive model parameters and forming mechanism is established, which is a new angle in rheological behavior research and constitutive model analysis.

Keywords

Acknowledgements

The support of the Key Research and Development Program of Shaanxi (Program No. 2020ZDLGY01-05) is acknowledged.

Citation

Yang, J., Wu, J., Zhang, Q., Ren, Y., Ruolan, H. and Wang, K. (2021), "Linear analysis of parameters in Arrhenius model for Ti-6Al-4V at superplastic forming", Engineering Computations, Vol. 38 No. 6, pp. 2528-2551. https://doi.org/10.1108/EC-05-2020-0266

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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