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The Effect of Cyclic Closed Die Forging (CCDF) Process on Fatigue Crack Growth Behavior of Precipitation-Hardened Al 7075 Alloy | ||
| Iranian Journal of Materials Forming | ||
| دوره 13، شماره 4، دی 2026، صفحه 24-33 اصل مقاله (1.27 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2026.55549.1371 | ||
| نویسندگان | ||
| Mohammad Ali Moazam؛ Mohammad Honarpisheh* | ||
| Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran | ||
| چکیده | ||
| In this study, the effect of the cyclic closed die forging (CCDF) process on the fatigue crack growth rate (da/dN) of aluminum alloy 7075 in the peak-aged (T6) condition was experimentally investigated. Specimens were prepared in three different conditions: base T6, T6 with one pass of CCDF, and T6 with two passes of CCDF. Fatigue crack growth tests were conducted in accordance with the ISO 12108 standard using compact tension (CT) specimens. Key parameters, including the stress intensity factor range (ΔK) and crack growth rate (da/dN), were calculated and compared. The results indicated that CCDF-processed specimens exhibited about 33% improvement in resistance to fatigue crack initiation. They also tolerated more than 1 mm greater fatigue crack growth compared to the T6 specimen. Finally, the crack growth rate of CCDF-processed specimens decreased by up to 18% compared to the T6 specimen. Furthermore, no significant difference was observed between the performance of specimens subjected to one pass and two passes of CCDF. This improvement can be attributed to the refined microstructure, increased dislocation density, and better distribution of precipitates resulting from the CCDF process. The findings of this research represent an effective step towards optimizing hybrid processes for improving the fatigue life of aluminum components in engineering applications. | ||
| کلیدواژهها | ||
| Aluminum alloy 7075؛ Cyclic closed die forging (CCDF)؛ Fatigue crack growth؛ Crack growth rate (da/dN)؛ Stress intensity factor range (ΔK) | ||
| مراجع | ||
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[1] Gosh A. K. (1988). Method of producing a fine grain aluminum alloy using three axes deformation. U.S. Patent No. 4721537.
[2] Cherukuri, B., Srinivasan, R. (2006). Properties of AA6061 processed by multi-axial compressions/forging (MAC/F). Materials and Manufacturing Processes, 21(5), 519-525. https://doi.org/10.1080/10426910500471649
[3] Zude, Z., Qiang, C., Zejun, T., Chuankai, H. (2010). Microstructural evolution and tensile mechanical properties of AM60B magnesium alloy prepared by the SIMA route. Journal of Alloys and Compounds, 497, 402–411. https://doi.org/10.1016/S1003-6326(13)62853-8
[4] Gao-zhan, Z., Lin, Y., Xun-xing, D., Xiao-hua, R., Li-min, Z., Ting-jun, Y., Xiang-yong, G., Shao-nan. H. (2012). Microstructure evolution and mechanical properties of AZ80 alloy reheated from as-cast and deformed states, Transactions of Nonferrous Metals Society of China, 22(2), 450-456. https://doi.org/10.1016/S1003-6326(12)61745-2
[5] Xia, X., Huang, J., Zhang, R., Zhao, Q., Hu, Q., Deng, T., Xiao, Y. Sun, J. (2013). Evolution of microstructure and mechanical properties of AZ61 Mg alloy during cyclic closed die forging. Materials Research Innovations 17(1), 130-134. https://doi.org/10.1179/1432891713Z.000000000203
[6] Metayer, J., Bing, Y., Wei, G., Qu-dong, W., Hao, Z., Mollet, F. (2014). Microstructure and mechanical properties of Mg–Si alloys processed by cyclic closed-die forging, Transactions of Nonferrous Metals Society of China, 24(1), 66-75. https://doi.org/10.1016/S1003-6326(14)63029-6
[7] Valiev, R. Z., Islamgaliev, R. K., & Alexandrov, I. V. (2000). Bulk nanostructured materials from severe plastic deformation. Progress in materials science, 45(2), 103-189. https://doi.org/10.1016/S0079-6425(99)00007-9
[8] Estrin, Y., & Vinogradov, A. (2013). Extreme grain refinement by severe plastic deformation: A wealth of challenging science. Acta Materialia, 61(3), 782-817. https://doi.org/10.1016/j.actamat.2012.10.038
[9] Heinz, A., Haszler, A., Keidel, C., Moldenhauer, S., Benedictus, R., & Miller, W. S. (2000). Recent development in aluminium alloys for aerospace applications. Materials Science and Engineering: A, 280(1), 102-107. https://doi.org/10.1016/S0921-5093(99)00674-7
[10] Williams, J. C., & Starke, E. A. (2003). Progress in structural materials for aerospace systems. Acta Materialia, 51(19), 5775-5799. https://doi.org/10.1016/j.actamat.2003.08.023
[11] Sha, G., & Cerezo, A. (2004). Early-stage precipitation in Al–Zn–Mg–Cu alloy (7050). Acta Materialia, 52(15), 4503–4516. https://doi.org/10.1016/j.actamat.2004.06.025
[12] Panigrahi, S. K., & Jayaganthan, R. (2011). Development of ultrafine grained high strength age hardenable Al 7075 alloy by cryorolling. Materials & Design, 32(6), 3150-3160. https://doi.org/10.1016/j.matdes.2011.02.051
[13] Esmaeili, A., Shaeri, H., Noghani, M., Razaghian, A. (2018). Fatigue behavior of AA7075 aluminium alloy severely deformed by equal channel angular pressing. Journal of Alloys and Compounds, 757, 324-332. https://doi.org/10.1016/j.jallcom.2018.05.085
[14] Moazam, M. A., & Honarpisheh, M. (2019). Ring-core integral method to measurement residual stress distribution of Al-7075 alloy processed by cyclic close die forging. Materials Research Express, 6(8), 0865j3. https://iopscience.iop.org/article/10.1088/2053-1591/ab29b6
[15] Moazam, M. A., & Honarpisheh, M. (2020). The effects of combined cyclic close die forging and aging process on microstructure and mechanical properties of AA7075. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 234(9), 1242-1251. https://doi.org/10.1177/1464420720931528
[16] Moazam, M. A., & Honarpisheh, M. (2021). Improving the mechanical properties and reducing the residual stresses of AA7075 by combination of cyclic close die forging and precipitation hardening. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 235(3), 542-549. https://doi.org/10.1177/1464420720972428
[17] ISO 12108:2018. (2018). Metallic materials — Fatigue testing — Fatigue crack growth method. International Organization for Standardization.
[18] ASTM E647-15. (2015). Standard test method for measurement of fatigue crack growth rates. ASTM International. | ||
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