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

Junzhou Yang, Jianjun Wu, Qianwen Zhang, Yinxiang Ren, Han Ruolan, Kaiwei Wang

Engineering Computations

ISSN: 0264-4401

Article publication date: 28 December 2020

Issue publication date: 9 July 2021

226

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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