Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing
The grain refinement by high-pressure torsion (HPT) process and high-temperature stability have been studied in a commercial non-heat-treated aluminium alloy, 5052. The HPT process was conducted on 10 mm disks of the alloys at room temperature with an applied pressure of 6 GPa for 5 and 10 turns wit...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Kebangsaan Malaysia
2024
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| Online Access: | http://journalarticle.ukm.my/25400/ http://journalarticle.ukm.my/25400/1/kejut_29.pdf |
| _version_ | 1848816347864104960 |
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| author | Ahmad Muhammad Aziz, Intan Fadhlina Mohamed, Mohd Zaidi Omar, Zainuddin Sajuri, Norinsan Kamil Othman, Mohammad Azlan Aripin, Nor Kamaliana Khamis, Hawa Hishamuddin, |
| author_facet | Ahmad Muhammad Aziz, Intan Fadhlina Mohamed, Mohd Zaidi Omar, Zainuddin Sajuri, Norinsan Kamil Othman, Mohammad Azlan Aripin, Nor Kamaliana Khamis, Hawa Hishamuddin, |
| author_sort | Ahmad Muhammad Aziz, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | The grain refinement by high-pressure torsion (HPT) process and high-temperature stability have been studied in a commercial non-heat-treated aluminium alloy, 5052. The HPT process was conducted on 10 mm disks of the alloys at room temperature with an applied pressure of 6 GPa for 5 and 10 turns with a rotation speed of 1 rpm. The HPT processing leads to microstructural refinement with an average grain size of ~188 nm and ~156 nm for 5 turns and 10 turns with an increased value of dislocation density. The Vickers microhardness test was performed at 100 gf for a duration of 15 s. It was found that the hardness increased from the onset of straining and saturated at approximately 165 Hv after processing at both 5 and 10 turns. The samples were then annealed at high temperatures. The study demonstrated that annealing at 200 °C for 1 h reduced the hardness by 30% in both samples and enlarged the gain sizes to 226 nm. The results indicated that the rate of hardness decrease is faster in 10 turns compared with 5 turns thus explaining the higher kinetic annihilation phenomenon observed in higher straining in 10 turns due to the higher stored energy in the grains. |
| first_indexed | 2025-11-15T01:04:26Z |
| format | Article |
| id | oai:generic.eprints.org:25400 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:04:26Z |
| publishDate | 2024 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:254002025-06-24T08:03:48Z http://journalarticle.ukm.my/25400/ Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing Ahmad Muhammad Aziz, Intan Fadhlina Mohamed, Mohd Zaidi Omar, Zainuddin Sajuri, Norinsan Kamil Othman, Mohammad Azlan Aripin, Nor Kamaliana Khamis, Hawa Hishamuddin, The grain refinement by high-pressure torsion (HPT) process and high-temperature stability have been studied in a commercial non-heat-treated aluminium alloy, 5052. The HPT process was conducted on 10 mm disks of the alloys at room temperature with an applied pressure of 6 GPa for 5 and 10 turns with a rotation speed of 1 rpm. The HPT processing leads to microstructural refinement with an average grain size of ~188 nm and ~156 nm for 5 turns and 10 turns with an increased value of dislocation density. The Vickers microhardness test was performed at 100 gf for a duration of 15 s. It was found that the hardness increased from the onset of straining and saturated at approximately 165 Hv after processing at both 5 and 10 turns. The samples were then annealed at high temperatures. The study demonstrated that annealing at 200 °C for 1 h reduced the hardness by 30% in both samples and enlarged the gain sizes to 226 nm. The results indicated that the rate of hardness decrease is faster in 10 turns compared with 5 turns thus explaining the higher kinetic annihilation phenomenon observed in higher straining in 10 turns due to the higher stored energy in the grains. Penerbit Universiti Kebangsaan Malaysia 2024 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/25400/1/kejut_29.pdf Ahmad Muhammad Aziz, and Intan Fadhlina Mohamed, and Mohd Zaidi Omar, and Zainuddin Sajuri, and Norinsan Kamil Othman, and Mohammad Azlan Aripin, and Nor Kamaliana Khamis, and Hawa Hishamuddin, (2024) Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing. Jurnal Kejuruteraan, 36 (3). pp. 1199-1205. ISSN 0128-0198 https://www.ukm.my/jkukm/volume-3603-2024/ |
| spellingShingle | Ahmad Muhammad Aziz, Intan Fadhlina Mohamed, Mohd Zaidi Omar, Zainuddin Sajuri, Norinsan Kamil Othman, Mohammad Azlan Aripin, Nor Kamaliana Khamis, Hawa Hishamuddin, Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| title | Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| title_full | Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| title_fullStr | Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| title_full_unstemmed | Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| title_short | Microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| title_sort | microhardness and microstructure of aluminium alloy 5052 by high-pressure torsion process and subsequent annealing |
| url | http://journalarticle.ukm.my/25400/ http://journalarticle.ukm.my/25400/ http://journalarticle.ukm.my/25400/1/kejut_29.pdf |