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Strength and Superplasticity of AA 7075 Aluminum Alloy Fabricated By Multidirectional Forging Cover

Strength and Superplasticity of AA 7075 Aluminum Alloy Fabricated By Multidirectional Forging

Acta Mechanica et Automatica
Volume 19 (2025): Issue 4 (December 2025)
By: Manh Hung LE,  Manh Tien NGUYEN and  Truong An NGUYEN  
Open Access
|Dec 2025

Figures & Tables

Fig. 1.

Original sample (a) and MDF process diagram with 1 cycle in three sample directions (b)
Original sample (a) and MDF process diagram with 1 cycle in three sample directions (b)

Fig. 2.

Cross-sectional optical microstructure of the samples: (a) the original sample; b) the MDF-1 sample; c) the MDF-3 sample; (d) the MDF-4 sample
Cross-sectional optical microstructure of the samples: (a) the original sample; b) the MDF-1 sample; c) the MDF-3 sample; (d) the MDF-4 sample

Fig. 3.

Change of microhardness determined at the mid-section positions with distance from the center of the MDFed sample in the length direction (a) and width direction (b) for the MDF-3 sample and the MDF-4 sample
Change of microhardness determined at the mid-section positions with distance from the center of the MDFed sample in the length direction (a) and width direction (b) for the MDF-3 sample and the MDF-4 sample

Fig. 4.

Engineering stress-relative elongation curves of the original sample, the MDF-3 sample, and the MDF-4 sample
Engineering stress-relative elongation curves of the original sample, the MDF-3 sample, and the MDF-4 sample

Fig. 5.

Shape changes in the tensile samples of AA7075 alloy fabricated by MDF-3 sample and MDF-4 sample under the superplastic deformation conditions (a); and dimension of the tensile samples (b)
Shape changes in the tensile samples of AA7075 alloy fabricated by MDF-3 sample and MDF-4 sample under the superplastic deformation conditions (a); and dimension of the tensile samples (b)

Fig. 6.

The flow stress - relative elongation curves at 530 °C for the MDF-3 sample (a), the MDF-4 sample (b) and the elongation and the flow stress of the MDFed (c,d) with different strain rates
The flow stress - relative elongation curves at 530 °C for the MDF-3 sample (a), the MDF-4 sample (b) and the elongation and the flow stress of the MDFed (c,d) with different strain rates

Tensile test results of the MDF-processed samples at different strain rates

SamplesElongations (%)
Strain rate 10–4 (s–1)Strain rate 10–3 (s–1)Strain rate 10–2 (s–1)
MDF-3160200140
MDF-4220350180
DOI: https://doi.org/10.2478/ama-2025-0083 | Journal eISSN: 2300-5319 | Journal ISSN: 1898-4088
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Language: English
Page range: 742 - 748
Submitted on: Aug 15, 2025
|
Accepted on: Nov 11, 2025
|
Published on: Dec 31, 2025
Published by: Bialystok University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
AA7075 aluminum alloy,
Superplasticity,
multidirectional forging (MDF),
severe plastic deformation (SPD),
microhardness,
tensile test
Related subjects:
Engineering,
Electrical engineering,
Electronics,
Mechanical engineering,
Mechanics,
Bioengineering and biomedical engineering,
Biomechanics,
Civil engineering,
Environmental engineering

© 2025 Manh Hung LE, Manh Tien NGUYEN, Truong An NGUYEN, published by Bialystok University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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