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Work hardening behavior and model validationsfor aluminum alloy AA7075 |
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| รหัสดีโอไอ | |
| Creator | 1. Nakarin Vutipow 2. Terdsak Arlai 3. Patiphan Juijerm |
| Title | Work hardening behavior and model validationsfor aluminum alloy AA7075 |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2565 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 3 |
| Page no. | 662-667 |
| Keyword | work hardening, aluminum alloy, flow curve, tension, compression |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | Work hardening behavior of flow curves of aluminum alloy AA7075 under tensile and compressive loading at roomtemperature was addressed. The Kocks-Mecking (K-M) and Crussard-Jaoul (C-J) models were applied to analyze the workhardening behavior. Constitutive models, i.e., Hollomon, Ludwigson, Swift, Ludwik, and Voce, were used to predict the flowstresses during tensile/compressive loading. All models were validated, and the empirical parameters were determined byexperimental data. The sum of squares of deviations of the prediction (Chi-square, ๏ฃ2), coefficient of correlation (R2) and the meanabsolute percentage error (MAPE) were calculated to validate simulated flow stresses. It was found that the flow curves exhibiteda positive work hardening rate. The K-M plot (work hardening rate versus true stress) showed the work hardening of stage III witha single negative slope value. All models excellently predicted flow stresses with very low MAPE. Moreover, a piecewise regressionwas a meaningful method for accuracy improvement of the models |
