Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys
In order to increase the strength of Al-Zr alloys, which are promisingly used for heat-resistant conductors, the coupling effect of Mn addition (0.16 wt.% and 0.88 wt.%) and deformation on the precipitation, mechanical, and electrical properties of an Al-0.18wt.% Zr alloy was studied using transmiss...
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MDPI AG
2024-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/14/1/63 |
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| author | Ruihong Wang Yulei Lai Bilong Liu Bao’an Chen |
| author_facet | Ruihong Wang Yulei Lai Bilong Liu Bao’an Chen |
| author_sort | Ruihong Wang |
| collection | DOAJ |
| description | In order to increase the strength of Al-Zr alloys, which are promisingly used for heat-resistant conductors, the coupling effect of Mn addition (0.16 wt.% and 0.88 wt.%) and deformation on the precipitation, mechanical, and electrical properties of an Al-0.18wt.% Zr alloy was studied using transmission electron microscopy (TEM), atom probe tomography (APT), hardness testing, and electrical conductivity measurement, respectively. Results showed that the Mn addition fully suppresses the Al<sub>3</sub>Zr precipitation in both hot-deformed and undeformed cases, which is mainly due to a strong Mn-vacancy bonding, in which Mn atoms seize vacancies and hence reduce the available vacancies for Al<sub>3</sub>Zr nucleation. Minor 0.16 wt.% Mn addition causes a simultaneous decrease in hardness and electrical conductivity, regardless of whether there is deformation. The higher 0.88 wt.% Mn addition, however, significantly increases the hardness by over 40%, especially in combination with deformation. Possible influencing factors such as grain size, dislocations, intergranular/intragranular precipitation, and solute clusters are comparatively discussed in terms of microstructural features and mechanical/electrical properties that are tuned by Mn addition and/or deformation. It is found that the Mn addition can make remarkable contributions to the hardness and thermal stability of the Al-Zr alloys when coupled with deformation. |
| first_indexed | 2024-03-08T10:40:03Z |
| format | Article |
| id | doaj.art-19b553556d68479c868b482b4630cec6 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-08T10:40:03Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-19b553556d68479c868b482b4630cec62024-01-26T17:41:05ZengMDPI AGMetals2075-47012024-01-011416310.3390/met14010063Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr AlloysRuihong Wang0Yulei Lai1Bilong Liu2Bao’an Chen3School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, ChinaIn order to increase the strength of Al-Zr alloys, which are promisingly used for heat-resistant conductors, the coupling effect of Mn addition (0.16 wt.% and 0.88 wt.%) and deformation on the precipitation, mechanical, and electrical properties of an Al-0.18wt.% Zr alloy was studied using transmission electron microscopy (TEM), atom probe tomography (APT), hardness testing, and electrical conductivity measurement, respectively. Results showed that the Mn addition fully suppresses the Al<sub>3</sub>Zr precipitation in both hot-deformed and undeformed cases, which is mainly due to a strong Mn-vacancy bonding, in which Mn atoms seize vacancies and hence reduce the available vacancies for Al<sub>3</sub>Zr nucleation. Minor 0.16 wt.% Mn addition causes a simultaneous decrease in hardness and electrical conductivity, regardless of whether there is deformation. The higher 0.88 wt.% Mn addition, however, significantly increases the hardness by over 40%, especially in combination with deformation. Possible influencing factors such as grain size, dislocations, intergranular/intragranular precipitation, and solute clusters are comparatively discussed in terms of microstructural features and mechanical/electrical properties that are tuned by Mn addition and/or deformation. It is found that the Mn addition can make remarkable contributions to the hardness and thermal stability of the Al-Zr alloys when coupled with deformation.https://www.mdpi.com/2075-4701/14/1/63Al-Zr alloyMn additionprecipitationmechanical propertieselectrical conductivity |
| spellingShingle | Ruihong Wang Yulei Lai Bilong Liu Bao’an Chen Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys Metals Al-Zr alloy Mn addition precipitation mechanical properties electrical conductivity |
| title | Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys |
| title_full | Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys |
| title_fullStr | Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys |
| title_full_unstemmed | Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys |
| title_short | Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys |
| title_sort | coupling effect of mn addition and deformation on mechanical and electrical properties of al zr alloys |
| topic | Al-Zr alloy Mn addition precipitation mechanical properties electrical conductivity |
| url | https://www.mdpi.com/2075-4701/14/1/63 |
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