An Investigation of the Equal Channel Angular Pressing Process on the Hardness of Heat-Treated Al-7075 Alloy

Authors

  • Qussay Salah Mahdi Production Engineering and Metallurgy Engineering Department, University of Technology-Iraq, Baghdad, Iraq
  • Rasha Ramiz Elias Production Engineering and Metallurgy Engineering Department, University of Technology-Iraq, Baghdad, Iraq
  • Mustafa Mohammed Abdulrazaq Production Engineering and Metallurgy Engineering Department, University of Technology-Iraq, Baghdad, Iraq
Volume: 15 | Issue: 3 | Pages: 22472-22477 | June 2025 | https://doi.org/10.48084/etasr.10911

Received: 11 March 2025 | Revised: 8 April 2025 | Accepted: 15 April 2025 | Online: 4 June 2025


Corresponding author: Rasha Ramiz Elias

Abstract

Equal-Channel Angular Pressing (ECAP) is among the most applicable severe plastic deformation processes used to fabricate ultrafine-grained materials with superior mechanical properties. In this study, Al-7075 alloy that has undergone heat treatment was processed with ECAP. The samples generated a variety of microstructures. ECAP has been carried out in a mold with 120° channel angle at room temperature. The findings demonstrate that after processing, brittle coarse silicon particles were successfully broken down to smaller sizes in Aluminum-rich matrix. Corrosion resistance and hardness tests improved following T6 and T5 heat treatments, with the former being preferred because of a complete change in the morphology of the silicon particles compared to the latter. Following three passes on the route Bc and 4 passes on route A, hardness was increased with ECAP processing from 60.66 Hv to 1133.47 Hv and 124.91 Hv and alloy's corrosion resistance evaluation improved from 0.04240 to 0.00173 and 0.00149 mmy-1. In the present study, the ECAP processing of Al-7075 alloy utilizing both techniques increased both hardness and strength.

Keywords:

ECAP, hardness, heat-treated Al-alloy

Downloads

Download data is not yet available.

References

T. Khelfa, J. A. Muñoz-Bolaños, F. Li, J. M. Cabrera-Marrero, and M. Khitouni, "Microstructure and Mechanical Properties of AA6082-T6 by ECAP Under Warm Processing," Metals and Materials International, vol. 26, no. 8, pp. 1247–1261, Aug. 2020.

M. Chegini, A. Fallahi, and M. H. Shaeri, "Effect of Equal Channel Angular Pressing (ECAP) on Wear Behavior of Al-7075 Alloy," Procedia Materials Science, vol. 11, pp. 95–100, Jan. 2015.

R. A. Parshikov, A. I. Rudskoy, A. M. Zolotov, and O. V. Tolochko, "Technological Problems of Equal Channel Angular Pressing," Reviews on Advanced Materials Science, vol. 34, pp. 26–36, 2013.

A. S. Bedan, K. kadhim Mansor, K. K. Anwer, and H. H. Kadhim, "Design and Implementation of Asymmetric Extrusion Die Using Bezier Technique," IOP Conference Series: Materials Science and Engineering, vol. 881, no. 1, Apr. 2020, Art. no. 012052.

S. K. Shather and Q. S. Mahdi, "Investigating affecting parameters on surface roughness and metal removal rate in wire electrical discharge machining process," IOP Conference Series: Materials Science and Engineering, vol. 881, no. 1, Apr. 2020, Art. no. 012078.

M. A. Gebril, M. Z. Omar, N. Othman, and I. F. Mohamed, "Effect of Equal Channel Angular Pressing Processing Routes on Corrosion Resistance and Hardness of Heat Treated A356 Alloy," Sains Malaysiana, vol. 48, no. 3, pp. 661–668, Mar. 2019.

Z. S. Ali, R. R. Elias, and Q. S. Mahdi, "Investigating affecting EDM process parameters on material removal rate, electrode wear rate and surface roughness of tool steel," AIP Conference Proceedings, vol. 2415, no. 1, p. 060027, Dec. 2022.

M. El-Shenawy et al., "Effect of ECAP on the Plastic Strain Homogeneity, Microstructural Evolution, Crystallographic Texture and Mechanical Properties of AA2xxx Aluminum Alloy," Metals, vol. 11, no. 6, Jun. 2021, Art. no. 938.

S. M. Rajaa, H. A. Abdulhadi, K. S. Jabur, and G. R. Mohammed, "Aging Time Effects on the Mechanical Properties of Al 6061-T6 Alloy," Engineering, Technology & Applied Science Research, vol. 8, no. 4, pp. 3113–3115, Aug. 2018.

H. S. Kim et al., "Process Modelling of Equal Channel Angular Pressing for Ultrafine Grained Materials," Materials Transactions, vol. 45, no. 7, pp. 2172–2176, 2004.

A. de A. Mendes Filho, E. F. Prados, G. T. Valio, J. B. Rubert, V. L. Sordi, and M. Ferrante, "Severe plastic deformation by equal channel angular pressing: product quality and operational details," Materials Research, vol. 14, pp. 335–339, Sep. 2011.

R. Reda, "Equal Channel Angular Pressing (ECAP): Die Design, Processing Handicaps and Mechanical Characterization," Evolutions in Mechanical Engineering, vol. 2, no. 5, pp. 1–7, May 2019.

C. Elibol, K. Sagir, and M. Dogan, "Effect of equal-channel angular pressing on microstructure, aging kinetics and impact behavior in a 7075 aluminum alloy," Materials Today Communications, vol. 39, p. 108931, Jun. 2024.

M. Gruber et al., "Effect of Equal-Channel Angular Pressing and Targeted Heat Treatment on Aluminum AA7075 Sheet Metal," in Characterization of Minerals, Metals, and Materials 2022, 2022, pp. 25–36.

A. S. Jaber, A. M. Saleh, and M. Q. Ibraheem, "A Study on the Influence of Enclosure Temperature Control on the Printing of ABS Filament in a Three-Dimension Printer," Engineering, Technology & Applied Science Research, vol. 15, no. 2, pp. 20681–20686, Apr. 2025.

Downloads

How to Cite

[1]
Mahdi, Q.S., Elias, R.R. and Abdulrazaq, M.M. 2025. An Investigation of the Equal Channel Angular Pressing Process on the Hardness of Heat-Treated Al-7075 Alloy. Engineering, Technology & Applied Science Research. 15, 3 (Jun. 2025), 22472–22477. DOI:https://doi.org/10.48084/etasr.10911.

Metrics

Abstract Views: 27
PDF Downloads: 32

Metrics Information

License

Copyright (c) 2025 Qussay Salah Mahdi, Rasha Ramiz Elias, Mustafa Mohammed Abdulrazaq

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.