Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy
Binary Al–Cu alloy has always been used to illustrate the phenomenon of precipitation hardening. Meanwhile, Al–Cu alloy has good heat resistance and is a potential heat-resistant conductor material, but there is not much research work on its electrical properties. In this work, the residual resistiv...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ac5351 |
| _version_ | 1827869137662115840 |
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| author | Langjie Zhu Yu Wang Jian Mao |
| author_facet | Langjie Zhu Yu Wang Jian Mao |
| author_sort | Langjie Zhu |
| collection | DOAJ |
| description | Binary Al–Cu alloy has always been used to illustrate the phenomenon of precipitation hardening. Meanwhile, Al–Cu alloy has good heat resistance and is a potential heat-resistant conductor material, but there is not much research work on its electrical properties. In this work, the residual resistivity variation of Al-4Cu alloy at different aging stages was investigated. At the aging temperature of 160 °C, the residual resistivity of the Al-4Cu alloy decreases with the longer aging time, and it decreases rapidly in the early stage and slowly in the later stage, mainly due to the precipitation of solid solution Cu atoms and the interface electron scattering effect of different precipitates. In the early stage, massive precipitation of Cu atoms from the matrix can effectively reduce the crystal lattice distortion of Al matrix and significantly decrease the residual resistivity. Specifically, the residual resistivity of Al-4Cu alloy that aged at 160 °C for 13 h is 3.353 μ Ω·cm, which is only 82.6% of that in the supersaturated solid solution state. In later stage of aging, the main change is the evolution of the precipitated phase, i.e., the gradual disruption of the coherent relationship between the second phase and the Al matrix. And the coherency-strain fields decrease gradually, which is also beneficial in decreasing the residual resistivity. The results show that Al–Cu alloys can also be a potential heat-resistant conductor material for the power transmission industry. |
| first_indexed | 2024-03-12T15:40:44Z |
| format | Article |
| id | doaj.art-f7bc1cc0f07645d68a7f38130a3fc872 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:40:44Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-f7bc1cc0f07645d68a7f38130a3fc8722023-08-09T16:01:19ZengIOP PublishingMaterials Research Express2053-15912022-01-019202000410.1088/2053-1591/ac5351Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloyLangjie Zhu0https://orcid.org/0000-0002-1634-1083Yu Wang1Jian Mao2https://orcid.org/0000-0001-7368-8537College of Materials Science and Engineering, Sichuan University , Chengdu, 610065, People’s Republic of ChinaCollege of Materials Science and Engineering, Sichuan University , Chengdu, 610065, People’s Republic of ChinaCollege of Materials Science and Engineering, Sichuan University , Chengdu, 610065, People’s Republic of ChinaBinary Al–Cu alloy has always been used to illustrate the phenomenon of precipitation hardening. Meanwhile, Al–Cu alloy has good heat resistance and is a potential heat-resistant conductor material, but there is not much research work on its electrical properties. In this work, the residual resistivity variation of Al-4Cu alloy at different aging stages was investigated. At the aging temperature of 160 °C, the residual resistivity of the Al-4Cu alloy decreases with the longer aging time, and it decreases rapidly in the early stage and slowly in the later stage, mainly due to the precipitation of solid solution Cu atoms and the interface electron scattering effect of different precipitates. In the early stage, massive precipitation of Cu atoms from the matrix can effectively reduce the crystal lattice distortion of Al matrix and significantly decrease the residual resistivity. Specifically, the residual resistivity of Al-4Cu alloy that aged at 160 °C for 13 h is 3.353 μ Ω·cm, which is only 82.6% of that in the supersaturated solid solution state. In later stage of aging, the main change is the evolution of the precipitated phase, i.e., the gradual disruption of the coherent relationship between the second phase and the Al matrix. And the coherency-strain fields decrease gradually, which is also beneficial in decreasing the residual resistivity. The results show that Al–Cu alloys can also be a potential heat-resistant conductor material for the power transmission industry.https://doi.org/10.1088/2053-1591/ac5351microstructurephase transformationelectrical propertiesAl–Cu alloys |
| spellingShingle | Langjie Zhu Yu Wang Jian Mao Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy Materials Research Express microstructure phase transformation electrical properties Al–Cu alloys |
| title | Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy |
| title_full | Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy |
| title_fullStr | Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy |
| title_full_unstemmed | Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy |
| title_short | Understanding the effect of aging treatment on the electrical properties of Al-4Cu (wt.%) alloy |
| title_sort | understanding the effect of aging treatment on the electrical properties of al 4cu wt alloy |
| topic | microstructure phase transformation electrical properties Al–Cu alloys |
| url | https://doi.org/10.1088/2053-1591/ac5351 |
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