 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13362 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8178
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| In English (Mech. Solids): | | 5184 |
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| Yun Hyok Han, Kyong Ho Sim, Ryon Hui Pak, and Tae Myong Kim, "Constitutive Analysis on Hot Deformation Behavior of AA2099 Alloy for Modeling of Flow Stress," Mech. Solids. 60 (5), 4065-4078 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
5 |
Pages |
4065-4078 |
| DOI |
10.1134/S0025654425602253 |
| Title |
Constitutive Analysis on Hot Deformation Behavior of AA2099 Alloy for Modeling of Flow Stress |
| Author(s) |
Yun Hyok Han (Faculty of Materials Science and Technology, Kim Chaek University of Technology, Pyongyang, 999093 Democratic People’s Republic of Korea)
Kyong Ho Sim (Faculty of Materials Science and Technology, Kim Chaek University of Technology, Pyongyang, 999093 Democratic People’s Republic of Korea, sgh83818@star-co.net.kp)
Ryon Hui Pak (Department of Chemistry, Kim Il Sung University, Pyongyang, 999093 Democratic People’s Republic of Korea)
Tae Myong Kim (Faculty of Materials Science and Technology, Kim Chaek University of Technology, Pyongyang, 999093 Democratic People’s Republic of Korea) |
| Abstract |
The hot deformation behavior of AA2099 Al-Li alloy was analyzed constitutively to model flow stress during thermo-mechanical processing. In order to obtain the true stress-strain curve data of AA2099 Al-Li alloy, isothermal uniaxial compression tests were carried out using a Gleeble 3800D thermo-mechanical simulator in the strain rate range of 0.01–10 s−1 and deformation temperature range of 360–520°C. Based on the experimental data obtained here, three types of constitutive material models were developed: modified Johnson-Cook model, strain compensated Arrhenius model and microstructure-based model. For these three models, a modification was made to increase the prediction accuracy of high temperature flow stress. The prediction accuracy was estimated by means of the average absolute relative error and correlation coefficient, with 5.09% and 0.9928 for the modified Johnson-Cook model, 6.12% and 0.9820 for the strain compensated Arrhenius model, and, 1.58% and 0.9994 for the microstructure-based model. The flow stress predicted by the proposed microstructure-based model was in good consistent with the experimental results. This indicates that the proposed microstructure-based model can describe the hot deformation behavior of AA2099 Al-Li alloy very accurately. The developed constitutive material models are of great significance in the simulation and optimization of hot working processes of AA2099 Al-Li alloy. |
| Keywords |
AA2099 alloy, microstructure-based model, Johnson-Cook model, Arrhenius model |
| Received |
06 May 2025 | Revised |
09 July 2025 | Accepted |
09 July 2025 |
| Link to Fulltext |
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