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

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.

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