| تعداد نشریات | 24 |
| تعداد شمارهها | 916 |
| تعداد مقالات | 8,202 |
| تعداد مشاهده مقاله | 15,918,434 |
| تعداد دریافت فایل اصل مقاله | 13,469,788 |
Influence of Pre-Aging on Microhardness and Corrosion Resistance of AA6061 Processed by ECAP and NECAP | ||
| Iranian Journal of Materials Forming | ||
| دوره 13، شماره 4، دی 2026، صفحه 15-23 اصل مقاله (672.36 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2026.55621.1372 | ||
| نویسندگان | ||
| Arman Hasani* ؛ Abdelhameed Fardosi | ||
| Department of Mechanical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj 15175-66177, Iran | ||
| چکیده | ||
| This study investigates the initial heat treatment, namely annealing versus the peak-aged T6 condition, and subsequent severe plastic deformation (SPD) via equal-channel angular pressing (ECAP) and non-equal-channel angular pressing (NECAP), on the microhardness and corrosion resistance of AA6061 aluminum alloy. Samples in both the annealed and peak-aged conditions were subjected to a single pass of ECAP or NECAP, respectively. Microhardness was characterized using Vickers measurements on planes oriented perpendicular to the pressing (PPD) and extrusion (PED) directions. Corrosion behavior was evaluated using electrochemical impedance spectroscopy (EIS) conducted in a 3.5% NaCl solution. The results revealed that initial peak-aging substantially enhanced hardness while concurrently diminishing corrosion resistance relative to the annealed state. Both ECAP and NECAP processing resulted in significant improvements in hardness and corrosion resistance for both initial material conditions. A comparison of the SPD routes indicated that NECAP yielded slightly higher hardness values, particularly for the peak-aged material, whereas ECAP provided superior hardness uniformity between the PPD and PED planes and slightly enhanced corrosion resistance. Notably, the beneficial impact of SPD processing on hardness (relative increase) and corrosion resistance (final attained value) was more pronounced for the material initially in the annealed condition. These findings highlight the significant interplay between the initial microstructure and the chosen SPD methodology in tailoring the resultant mechanical and electrochemical characteristics of the AA6061 alloy. | ||
| کلیدواژهها | ||
| Aluminum alloy؛ SPD؛ Ultrafine-grained materials؛ Corrosion؛ Hardness | ||
| مراجع | ||
|
[1] Bagherpour, E., Pardis, N., & Reihanian, M. (2018). An overview on severe plastic deformation: Research status, techniques classification, microstructure evolution, and applications. The International Journal of Advanced Manufacturing Technology, 100, 1647-1734. https://doi.org/10.1007/s00170-018-2652-z
[2] Khanlari, H., Honarpisheh, M. (2020). Investigation of microstructure, mechanical properties and residual stress in non-equal-channel angular pressing of 6061 aluminum alloy. Transactions of the Indian Institute of Metals, 73(9), 1109-1121. https://doi.org/10.1007/s12666-020-01945-5
[3] Hasani, A., Toth, L. S., & Beausir, B. (2010). Principles of non-equal channel angular pressing. Journal of Engineering Materials and Technology, 132(3), 0310001. https://doi.org/10.1115/1.4001261
[4] Toth, L. S., Lapovok, R., Hasani, A., & Gu, C. (2009). Non-equal channel angular pressing of aluminum alloy. Scripta Materialia, 61(12), 1121-1124. https://doi.org/10.1016/j.scriptamat.2009.09.006
[5] Hasani, A., Toth, L. S., & Rouhani, S. M. (2019). A new flow line function for modeling material trajectory and textures in nonequal-channel angular pressing. Advances in Materials Science and Engineering, 2019(1), 5682585. https://doi.org/10.1155/2019/5682585
[6] Khan, A. S., & Meredith, C. S. (2010). Thermo-mechanical response of Al6061 with and without equal channel angular pressing (ECAP). International Journal of Plasticity, 26(2), 189-203. https://doi.org/10.1016/j.ijplas.2009.07.002
[7] El Aal, M. I. A. (2020). The influence of ECAP and HPT processing on the microstructure evolution, mechanical properties and tribology characteristics of an Al6061 alloy. Journal of Materials Research and Technology, 9(6), 12525-12546. https://doi.org/10.1016/j.jmrt.2020.08.099
[8] Nejadsey, O., Shokuhfar, A., Dabiri, A., & Azimi, A. (2015). Combining equal-channel angular pressing and heat treatment to obtain enhanced corrosion resistance in 6061 aluminum alloy. Journal of Alloys and Compounds, 648, 912-918. https://doi.org/10.1016/j.jallcom.2015.05.177
[9] Mehdizade, M., Eivani, A. R., & Soltanieh, M. (2020). Effects of reduced surface grain structure and improved particle distribution on pitting corrosion of AA6063 aluminum alloy. Journal of Alloys and Compounds, 838, 155464. https://doi.org/10.1016/j.jallcom.2020.155464
[10] Rominiyi, A. L., Oluwasegun, K. M., Olawale, J. O., Shongwe, M. B., & Adetunji, A. R. (2021). Effect of post-ECAP aging on the microstructure, hardness and impact behavior of 6061 Al alloy. Materials Today: Proceedings, 38, 1031-1034. https://doi.org/10.1016/j.matpr.2020.05.670
[11] Zheng, Z. J., Gao, Y., Gui, Y., & Zhu, M. (2012). Corrosion behavior of nanocrystalline 304 stainless steel prepared by equal channel angular pressing. Corrosion Science, 54, 60-67. https://doi.org/10.1016/j.corsci.2011.08.049
[12] Minárik, P., Král, R., & Janeček, M. (2013). Effect of ECAP processing on corrosion resistance of AE21 and AE42 magnesium alloys. Applied Surface Science, 281, 44-48. https://doi.org/10.1016/j.apsusc.2012.12.096
[13] Shishesaz, M. R., Ghobadi, M., Asadi, N., Zarezadeh, A., Saebnoori, E., Amraei, H., Schubert, J., & Chocholaty, O. (2021). Surface pretreatments of AA5083 aluminum alloy with enhanced corrosion protection for cerium-based conversion coatings application: Combined experimental and computational analysis. Molecules, 26(24), 7413. https://doi.org/10.3390/molecules26247413
[14] Ezuber, H. (2008). A study on the corrosion behavior of aluminum alloys in seawater. Materials & Design, 29(4), 801-805. https://doi.org/10.1016/j.matdes.2007.01.021
[15] Cao, C. (1990). On the impedance plane displays for irreversible electrode reactions based on the stability conditions of the steady-state—II. Two state variables besides electrode potential. Electrochimica Acta, 35(5), 837-844. https://doi.org/10.1016/0013-4686(90)90078-E
[16] He, T., Shi, W., Xiang, S., Huang, C., & Ballinger, R. G. (2021). Influence of aging on corrosion behavior of the 6061 cast aluminum alloy. Materials, 14(8), 1821. https://doi.org/10.3390/ma14081821
| ||
|
آمار تعداد مشاهده مقاله: 41 تعداد دریافت فایل اصل مقاله: 45 |
||