Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing
In this work, an Al foil wrapped AZ31 plate was fabricated by direct hot pressing with a thickness reduction of 50% at 300 °C. Effective metallurgical bonding was produced at the Mg/Al interface and no obvious defects were found. Annealing treatment at 400 °C can generate two continuous intermetalli...
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2024-12-01
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| author | Qi Shang Ying Yuan Haohua Xu Tingting Liu Yanxia Chen Jincheng Yu Hailian Wang Jun Tan Yuan Li Shengfeng Guo Bo Song |
| author_facet | Qi Shang Ying Yuan Haohua Xu Tingting Liu Yanxia Chen Jincheng Yu Hailian Wang Jun Tan Yuan Li Shengfeng Guo Bo Song |
| author_sort | Qi Shang |
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| description | In this work, an Al foil wrapped AZ31 plate was fabricated by direct hot pressing with a thickness reduction of 50% at 300 °C. Effective metallurgical bonding was produced at the Mg/Al interface and no obvious defects were found. Annealing treatment at 400 °C can generate two continuous intermetallic compound layers (Al<sub>3</sub>Mg<sub>2</sub> on the Al side and Mg<sub>17</sub>Al<sub>12</sub> on the Mg side) at the bonding interface. As annealing time increases, the intermetallic compound layers thicken, accompanied by the thinning and disappearance of the pure Al layer. After annealing for 8 h, a thick coating with the Al<sub>3</sub>Mg<sub>2</sub> and Mg<sub>17</sub>Al<sub>12</sub> mixture is formed on the surface of Mg plate. The micro-hardness of the intermetallic compound layers is much higher than that of the AZ31-substract and pure aluminum layer. Thus, the prolonged annealing (>4 h) can greatly increase the surface hardness. Compared with the as-received AZ31 sample, the corrosion resistance of the Al foil wrapped AZ31 plate can also be greatly improved. As annealing time increased from 0.5 to 8 h, the corrosion resistance showed a slightly decrease. In the present work, the sample annealed for 4 h gave the best consideration to surface hardness and corrosion resistance. |
| format | Article |
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| issn | 2075-4701 |
| language | English |
| publishDate | 2024-12-01 |
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| spelling | doaj-art-61247893980f4f3db7574592daab091a2025-08-20T02:00:39ZengMDPI AGMetals2075-47012024-12-011412140710.3390/met14121407Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and AnnealingQi Shang0Ying Yuan1Haohua Xu2Tingting Liu3Yanxia Chen4Jincheng Yu5Hailian Wang6Jun Tan7Yuan Li8Shengfeng Guo9Bo Song10School of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Mechanical Engineering, Wuxi Institute of Technology, Wuxi 214121, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaIn this work, an Al foil wrapped AZ31 plate was fabricated by direct hot pressing with a thickness reduction of 50% at 300 °C. Effective metallurgical bonding was produced at the Mg/Al interface and no obvious defects were found. Annealing treatment at 400 °C can generate two continuous intermetallic compound layers (Al<sub>3</sub>Mg<sub>2</sub> on the Al side and Mg<sub>17</sub>Al<sub>12</sub> on the Mg side) at the bonding interface. As annealing time increases, the intermetallic compound layers thicken, accompanied by the thinning and disappearance of the pure Al layer. After annealing for 8 h, a thick coating with the Al<sub>3</sub>Mg<sub>2</sub> and Mg<sub>17</sub>Al<sub>12</sub> mixture is formed on the surface of Mg plate. The micro-hardness of the intermetallic compound layers is much higher than that of the AZ31-substract and pure aluminum layer. Thus, the prolonged annealing (>4 h) can greatly increase the surface hardness. Compared with the as-received AZ31 sample, the corrosion resistance of the Al foil wrapped AZ31 plate can also be greatly improved. As annealing time increased from 0.5 to 8 h, the corrosion resistance showed a slightly decrease. In the present work, the sample annealed for 4 h gave the best consideration to surface hardness and corrosion resistance.https://www.mdpi.com/2075-4701/14/12/1407Mg alloyshot pressingintermetallic compoundmicro-hardnesscorrosion resistance |
| spellingShingle | Qi Shang Ying Yuan Haohua Xu Tingting Liu Yanxia Chen Jincheng Yu Hailian Wang Jun Tan Yuan Li Shengfeng Guo Bo Song Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing Metals Mg alloys hot pressing intermetallic compound micro-hardness corrosion resistance |
| title | Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing |
| title_full | Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing |
| title_fullStr | Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing |
| title_full_unstemmed | Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing |
| title_short | Microstructure and Properties of Al Foil Wrapped AZ31 Plate Prepared by Hot Pressing and Annealing |
| title_sort | microstructure and properties of al foil wrapped az31 plate prepared by hot pressing and annealing |
| topic | Mg alloys hot pressing intermetallic compound micro-hardness corrosion resistance |
| url | https://www.mdpi.com/2075-4701/14/12/1407 |
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