Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing
In the present study, the microstructure, mechanical properties, and stored energy of an aluminum alloy containing iron-rich fine precipitates, subjected to severe plastic deformation through equal-channel angular pressing (ECAP), were investigated using X-ray diffraction, scanning electron microsco...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/8/1160 |
| _version_ | 1797585044652425216 |
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| author | Atef Korchef Imen Souid |
| author_facet | Atef Korchef Imen Souid |
| author_sort | Atef Korchef |
| collection | DOAJ |
| description | In the present study, the microstructure, mechanical properties, and stored energy of an aluminum alloy containing iron-rich fine precipitates, subjected to severe plastic deformation through equal-channel angular pressing (ECAP), were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy. Up to four passes through ECAP resulted in significant nanometer-scale grain refinement, as well as the accumulation of lattice defects, such as dislocations and mesoscopic shear planes. This resulted in a noticeable enhancement in the Vickers microhardness and the flow stress after ECAP. Differential scanning calorimetry results showed that the ECAP’ed material exhibited two exothermal peaks at 222 ± 2 °C and 362 ± 2 °C, with total thermal effects of ΔH = 4.35 and 6.5 J/g, respectively. Slight increases in the ECAP’ed material microhardness and flow stress were observed at 200 °C. The heat release, at a relatively low temperature, and the slight improvement in the mechanical properties were attributed to the evolution of low- and high-angle misorientation, with the strain and the pinning of tangled dislocation caused by the existing fine particles. The second peak was attributed to grain growth, resulting in a significant softening of the material. |
| first_indexed | 2024-03-11T00:01:17Z |
| format | Article |
| id | doaj.art-6087dde073db4af9a9ba7900584a11b2 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T00:01:17Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-6087dde073db4af9a9ba7900584a11b22023-11-19T00:44:08ZengMDPI AGCrystals2073-43522023-07-01138116010.3390/cryst13081160Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular PressingAtef Korchef0Imen Souid1College of Sciences, King Khalid University (KKU), P.O. Box 9004, Abha 61413, Saudi ArabiaCollege of Sciences, King Khalid University (KKU), P.O. Box 9004, Abha 61413, Saudi ArabiaIn the present study, the microstructure, mechanical properties, and stored energy of an aluminum alloy containing iron-rich fine precipitates, subjected to severe plastic deformation through equal-channel angular pressing (ECAP), were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy. Up to four passes through ECAP resulted in significant nanometer-scale grain refinement, as well as the accumulation of lattice defects, such as dislocations and mesoscopic shear planes. This resulted in a noticeable enhancement in the Vickers microhardness and the flow stress after ECAP. Differential scanning calorimetry results showed that the ECAP’ed material exhibited two exothermal peaks at 222 ± 2 °C and 362 ± 2 °C, with total thermal effects of ΔH = 4.35 and 6.5 J/g, respectively. Slight increases in the ECAP’ed material microhardness and flow stress were observed at 200 °C. The heat release, at a relatively low temperature, and the slight improvement in the mechanical properties were attributed to the evolution of low- and high-angle misorientation, with the strain and the pinning of tangled dislocation caused by the existing fine particles. The second peak was attributed to grain growth, resulting in a significant softening of the material.https://www.mdpi.com/2073-4352/13/8/1160ECAPaluminum alloymicrostructuremechanical propertiesheat releasegrain refinement |
| spellingShingle | Atef Korchef Imen Souid Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing Crystals ECAP aluminum alloy microstructure mechanical properties heat release grain refinement |
| title | Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing |
| title_full | Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing |
| title_fullStr | Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing |
| title_full_unstemmed | Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing |
| title_short | Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing |
| title_sort | grain refinement and strengthening of an aluminum alloy subjected to severe plastic deformation through equal channel angular pressing |
| topic | ECAP aluminum alloy microstructure mechanical properties heat release grain refinement |
| url | https://www.mdpi.com/2073-4352/13/8/1160 |
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