THERMOMECHANICAL RESPONSE OF AS-CAST, HOMOGENISED AND EXTRUDED FORGING-GRADE 7075 ALLOY
Keywords:
aluminium alloys, compression test, processing maps
Abstract
The hot deformation behaviour of aluminium alloy EN AW-7075 was investigated in three material states: as-cast, homogenised and forging-grade, over a temperature range of 300–500 °C and strain rates of 0.01–10 s–1. Compression tests were performed on cylindrical specimens using a Gleeble 3500P thermomechanical simulator. Using correction methods, the results were curated for modelling applications, providing simulation-ready data. As stationary conditions were observed at ε = 0.4 and ε = 0.8, further analysis was conducted on state variables such as strain-rate sensitivity (m), temperature sensitivity (s), activation energy (Q) and instability (n), for which maps were constructed. The analysis of metallurgical state variables provides insight into the optimal processing domains for the EN AW-7075 wrought aluminium alloy.
References
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14 A. Jenab, A. Karimi Taheri, K. Jenab, The Use of ANN to Predict the Hot Deformation Behavior of AA7075 at Low Strain Rates., J. Mater. Eng. Perform., 22 (2013), 903-910, doi: 10.1007/s11665-012-0332-y
15 J.C. Malas III: Methodology for design and control of. thermomechanical processes, Ph.D. thesis, Ohio University, Athens, OH, 1991.
16 W.J. Kim, H.T. Jeong, Easy construction of processing maps for metallic alloys using a flow instability criterion based on power-law breakdown, J. Mater. Res. Technol., 9 (2020) 3, 5134-5143, doi: 10.1016/j.jmrt.2020.03.030
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19 A. Woźnicki, B. Leszczyńska-Madej, G. Włoch, J. Grzyb, J. Madura, D. Leśniak, Homogenization of 7075 and 7049 Aluminium Alloys Intended for Extrusion Welding. Metals, 11 (2021), 338, doi: 10.3390/met11020338
20 F. Montheillet, J. J. Jonas, K. W. Neale, Modeling of dynamic material behavior: A critical evaluation of the dissipator power co-content approach, Metall. Mater. Trans., A, 27 (1996), 232-235, doi: 10.1007/BF02647764
21 P. Zhou, L. Deng, M. Zhang, P. Gong, X.-Y. Wang, Characterization of hot workability of 5052 aluminum alloy based on activation energy-processing map, J. Mater. Eng. Perform., 28 (2019), 6209-6218, doi: 10.1007/s11665-019-04367-7
22 J. Kliber, I. Schindler, P. Kawulok, R. Sedláček, Energy dissipation and instability parameter at high temperature forming of middle carbon steel. In Proceedings of the 26th International Conference on Metallurgy and Materials, Brno, Czech Republic, 24-26 May 2017; Tanger Ltd.: Ostrava, Czech Republic, 2018, 370-374
23 P. Opěla, I. Schindler, P. Kawulok, R. Kawulok, S. Rusz, H. Navrátil, R. Jurča, Correlation among the Power Dissipation Efficiency, Flow Stress Course, and Activation Energy Evolution in Cr-Mo Low-Alloyed Steel, Materials, 13 (2020), 3480, doi: 10.3390/ma13163480
2 J. Sessler, V. Weiss, Materials Data Handbook : Aluminium Alloy 7075, Department of Chemical Engineering and Metallurgy, Syracuse University, Syracuse, New York 1966.
3 R. F. Muraca, J. S. Whittick, Materials Data Handbook, 2nd Edition, Western Applied Research & Development, Inc. 1972.
4 T. Sheppard, Extrusion of Aluminum Alloys. Kluwer Academic Publishers, Norwell 1999, doi: 10.1007/978-1-4757-3001-2
5 L. Guo, S. Yang, H. Yang, J. Zhang, Processing map of as-cast 7075 aluminum alloy for hot working, Chin. J. of Aeronaut., 28 (2015) 6, 1774-1783, doi: 10.1016/j.cja.2015.08.002
6 Y. V. R. K. Prasad, H. L. Gegel, S. M. Doraivelu, J. C. Malas, J. T. Morgan, K. A. Lark, D. R. Barker, Modeling of dynamic material behavior in hot deformation: Forging of Ti-6242, Metall. Trans. A, 15 (1984), 1883–1892, doi: 10.1007/BF02664902
7 Y.V.R.K. Prasad, Author’s reply: Dynamic materials model: Basis and principles, Metall. Trans. A, 27 (1996), 235–236, doi: 10.1007/BF02647765
8 Y.V.R.K. Prasad, T. Seshacharyulu, Processing maps for hot working of titanium alloys, Mater. Sci. Eng., A, 243 (1998) 1-2, 82-88, doi: 10.1016/S0921-5093(97)00782-X
9 S.C Medeiros, Y.V.R.K Prasad, W.G Frazier, R Srinivasan, Microstructural modeling of metadynamic recrystallization in hot working of IN 718 superalloy, Mater. Sci. Eng., A, 293 (2000) 1-2, 198-207, doi: 10.1016/S0921-5093(00)01053-4
10 Y.V.R.K. Prasad, Processing maps: A status report, J. Mater. Eng. Perform., 12 (2003), 638-645, doi: 10.1361/105994903322692420
11 S.Y. Park, W.J. Kim, Difference in the Hot Compressive Behavior and Processing Maps between the As-cast and Homogenized Al-Zn-Mg-Cu (7075) Alloys, J. Mater. Sci. Technol., 32 (2016) 7, 660-670, doi: 10.1016/j.jmst.2016.04.006
12 H. T. Jeong, W. J. Kim, Comparison of Hot Deformation Behavior Characteristics Between As-Cast and Extruded Al-Zn-Mg-Cu (7075) Aluminum Alloys with a Similar Grain Size, Materials, 12 (2019) 23, 3807, doi: 10.3390/ma12233807
13 Tareg S. Ben Naser, G. Krallics, Mechanical Behavior of Multiple-forged Al 7075 Aluminum Alloy, Acta Polytech. Hung., 11 (2014) 7, 103-117, doi: 10.12700/aph.11.07.2014.07.7
14 A. Jenab, A. Karimi Taheri, K. Jenab, The Use of ANN to Predict the Hot Deformation Behavior of AA7075 at Low Strain Rates., J. Mater. Eng. Perform., 22 (2013), 903-910, doi: 10.1007/s11665-012-0332-y
15 J.C. Malas III: Methodology for design and control of. thermomechanical processes, Ph.D. thesis, Ohio University, Athens, OH, 1991.
16 W.J. Kim, H.T. Jeong, Easy construction of processing maps for metallic alloys using a flow instability criterion based on power-law breakdown, J. Mater. Res. Technol., 9 (2020) 3, 5134-5143, doi: 10.1016/j.jmrt.2020.03.030
17 R. Ebrahimi, A. Najafizadeh, A new method for evaluation of friction in bulk metal forming, J. Mater. Process. Technol., 152 (2004) 2, 136-143, doi: 10.1016/j.jmatprotec.2004.03.029
18 R. L. Goetz, S. L. Semiatin, The adiabatic correction factor for deformation heating during the uniaxial compression test, J. Mater. Eng. Perform., 10 (2001), 710-717, doi: 10.1361/105994901770344593
19 A. Woźnicki, B. Leszczyńska-Madej, G. Włoch, J. Grzyb, J. Madura, D. Leśniak, Homogenization of 7075 and 7049 Aluminium Alloys Intended for Extrusion Welding. Metals, 11 (2021), 338, doi: 10.3390/met11020338
20 F. Montheillet, J. J. Jonas, K. W. Neale, Modeling of dynamic material behavior: A critical evaluation of the dissipator power co-content approach, Metall. Mater. Trans., A, 27 (1996), 232-235, doi: 10.1007/BF02647764
21 P. Zhou, L. Deng, M. Zhang, P. Gong, X.-Y. Wang, Characterization of hot workability of 5052 aluminum alloy based on activation energy-processing map, J. Mater. Eng. Perform., 28 (2019), 6209-6218, doi: 10.1007/s11665-019-04367-7
22 J. Kliber, I. Schindler, P. Kawulok, R. Sedláček, Energy dissipation and instability parameter at high temperature forming of middle carbon steel. In Proceedings of the 26th International Conference on Metallurgy and Materials, Brno, Czech Republic, 24-26 May 2017; Tanger Ltd.: Ostrava, Czech Republic, 2018, 370-374
23 P. Opěla, I. Schindler, P. Kawulok, R. Kawulok, S. Rusz, H. Navrátil, R. Jurča, Correlation among the Power Dissipation Efficiency, Flow Stress Course, and Activation Energy Evolution in Cr-Mo Low-Alloyed Steel, Materials, 13 (2020), 3480, doi: 10.3390/ma13163480
Published
2026-07-22
How to Cite
1.
Arzenšek M, Bombač D. THERMOMECHANICAL RESPONSE OF AS-CAST, HOMOGENISED AND EXTRUDED FORGING-GRADE 7075 ALLOY. MatTech [Internet]. 2026Jul.22 [cited 2026Oct.11];60(4):531–540. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/1649
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