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Gao X, Gao G, Li Z, Li X, Yan L, Zhang Y, Xiong B. Effects of Different Heating and Cooling Rates during Solution Treatment on Microstructure and Properties of AA7050 Alloy Wires. MATERIALS (BASEL, SWITZERLAND) 2024; 17:310. [PMID: 38255477 PMCID: PMC10817534 DOI: 10.3390/ma17020310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/26/2023] [Accepted: 12/25/2023] [Indexed: 01/24/2024]
Abstract
In the present study, the effects of varying heating and cooling rates during the solution treatment process on the microstructure and properties of AA7050 alloy wires were investigated using tensile tests, metallographic microscopy, electron backscattered diffraction, and transmission electron microscopy. It was found that the recrystallized grain size of the alloy, subjected to method of rapid heating, exhibited a smaller and more uniform distribution in comparison to method of slow heating. The low density of η' strengthening phases after the artificial aging treatment was formed using air cooling method. Meanwhile, by using the water quenching method sufficient solute atoms and more nucleation sites were provided resulting in a large number of η' strengthening phases being formed. In addition, the alloy processed using the water quenching method displayed higher strength than that treated using the air cooling method for the T6 and T73 states. Furthermore, coarse precipitates formed and less clusters were observed in the matrix, while high density nanoscale clusters and no continuous precipitation are formed when using the water quenching method.
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Affiliation(s)
- Xinyu Gao
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- Northeast Light Alloy Co., Ltd., Harbin 150060, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Guanjun Gao
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- General Research Institute for Nonferrous Metals, Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
| | - Zhihui Li
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Xiwu Li
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- General Research Institute for Nonferrous Metals, Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
| | - Lizhen Yan
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- General Research Institute for Nonferrous Metals, Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
| | - Yongan Zhang
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- General Research Institute for Nonferrous Metals, Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
| | - Baiqing Xiong
- State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China; (X.G.); (X.L.); (L.Y.); (Y.Z.); (B.X.)
- General Research Institute for Nonferrous Metals, Beijing 100088, China
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Gao G, Li X, Xiong B, Li Z, Zhang Y, Li Y, Yan L. Microstructure, Precipitates Behavior, and Mechanical Properties of Age-Hardened Al-Mg-Si Alloy Sheet Fabricated by Twin-Roll Casting. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5638. [PMID: 36013775 PMCID: PMC9412303 DOI: 10.3390/ma15165638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/05/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Twin-roll casting (TRC), as a near-net-shape technology, is employed to fabricate age-hardened Al-Mg-Si alloy. Compared with conventional direct chill (DC) casting, the TRC method is much more economical and efficient. In this work, the microstructure, precipitates behavior, and mechanical properties of age-hardened Al-Mg-Si alloy sheet fabricated by TRC were investigated by hardness measurements and tensile tests, metallographic microscopy, field emission gun scanning electron microscope, electron backscatter diffraction, transmission electron microscopy, and differential scanning calorimetry analyses. It was found that the size of recrystallized grains for DC casting alloy with finely dispersed particles was larger than that of TRC alloy with coarse particles. Typical CubeND texture accompanied by P texture formed after solution treatment made the value of r reach ~0.7 in the TRC alloy due to the PSN effect caused by the segregation of particles. More GP zones resulted in the strength of TRC alloy being higher than that of DC casting alloy after T8X treatment. With the time of paint-bake hardening extended to 8 h, few segregation particles remained in the TRC alloy. This decreased the concentration of supersaturated atoms. The hardness of the TRC alloy with the lower density of the β″ strengthening phase was lower compared to the DC casting alloy.
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Affiliation(s)
- Guanjun Gao
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Xiwu Li
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Baiqing Xiong
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Zhihui Li
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Yongan Zhang
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Yanan Li
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Lizhen Yan
- State Key Laboratory of Non-Ferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
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