To read this content please select one of the options below:

A modified Arrhenius model for as-quenched Al-Mg-Si alloy considering the effect of cooling rate

Ruichao Guo (College of Aeronautical Engineering and Shandong Engineering Research Center of Aeronautical Materials and Devices, Binzhou University, Binzhou, China and P.R China and School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Jianjun Wu (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)
Yinxiang Ren (School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 5 October 2020

Issue publication date: 30 June 2021

160

Abstract

Purpose

Accurate prediction of residual stress requires precise knowledge of the constitutive behavior of as-quenched material. This study aims to model the flow stress behavior for as-quenched Al-Mg-Si alloy.

Design Methodology Approach

In the present work, the flow behavior of as-quenched Al-Mg-Si alloy is studied by the hot compression tests at various temperatures (573–723 K), strain rates (0.1–1 s−1) and cooling rates (1–10 K/s). Flow stress behavior is then experimentally observed, and an Arrhenius model is used to predict the flow behavior. However, due to the fact that materials parameters and activation energy do not remain constant, the Arrhenius model has an unsatisfied prediction for the flow behavior. Considering the effects of temperatures, strain rates and cooling rates on constitutive behavior, a revised Arrhenius model is developed to describe the flow stress behavior.

Findings

The experimental results show that the flow stress increases by the increasing cooling rate, increasing strain state and decreasing temperature. In comparison to the experimental data, the revised Arrhenius model has an excellent prediction for as-quenched Al-Mg-Si alloy.

Originality Value

With the revised Arrhenius model, the flow behaviors at different quenching conditions can be obtained, which is an essential step to the residual stress prediction when the model is implemented in a finite element code, e.g. ABAQUS, in the future.

Keywords

Acknowledgements

This work was supported by Key Research and Development Program of Shaanxi of China (No.2020ZDLGY01-05).

Citation

Guo, R., Wu, J. and Ren, Y. (2021), "A modified Arrhenius model for as-quenched Al-Mg-Si alloy considering the effect of cooling rate", Engineering Computations, Vol. 38 No. 5, pp. 2003-2023. https://doi.org/10.1108/EC-03-2020-0159

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

Related articles