Materials Reports 2021, Vol. 35 Issue (Z1): 421-424 |
METALS AND METAL MATRIX COMPOSITES |
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Effect of Holding Time on the Elements Expansion and Mechanical Properties of 2024 Alclad Sheet |
HUANG Tongjian1, CHAO Daiyi1,2,3, YU Fang1, ZHANG Ruiyuan1, ZHOU Yanyan1, ZHAO Xiaohong1,3, XU Zhiyuan1
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1 National Engineering Research Center for Plastic Working of Aluminum Alloys, Shandong Nanshan Aluminum Co., Ltd., Longkou 265713, China 2 Shandong Nanshan Science and Technology Research Institute Co., Ltd., Longkou 265713,China 3 College of Engineering, Yantai Nanshan University, Longkou 265713,China |
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Abstract In order to investigate the relationship between element diffusion and performance of 2024 alclad sheet for the large aircraft skin. In this work, OM, SEM, and tensile tests are used to study the effects of solution time on the transition layer element diffusion and the mechanical properties of 2024 alu minum alloy clad sheet. The results show that the main alloy elements of the transition layer begin to gradually expand to the alu minum clad layer with the solution time increasing. When the solution time is 10 min, the diffusion of the main alloy elements Mg and Cu is very obvious. When the solution time reaches to 40 min, the main alloy elements almost diffused to the entire coating layer. The mechanical properties first increase rapidly with the solid solution time increasing, then tends to increase slower. The yield strength of the sample after solution treatment was 137 MPa for 2 min, and reached 272 MPa after 10 min. With the increase of solution time, the yield strength increased slowly, and basically remained at 280 MPa after 15 min. Therefore, when the continuous annealing line is used to solution treatment of large-size 2024 alclad sheet, the appropriate solution time is 10 min. The diffusion distance of alloy elements is small, and the yield strength of the alloy also meets the requirements after this solution treatment process.
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Published: 16 July 2021
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About author:: Tongjian Huang graduated from Lanzhou University of Technology in 2005 with a bachelor's degree in metal materials, Engineer. He is mainly engaged in rolling deformation technology research and development of aviation aluminum alloy.Daiyi Chao received his master of engineering in environmental and material engineering from Yantai University in June 2013. From September 2013 to March 2017, he studied for doctorate in School of Materials, Harbin Institute of Technology. At present, he works in Shandong Nanshan Science and Technology Research Institute as assistant to the president of Aluminum Research Institute. He is associate professor of Nanshan College. Now he has published more than 20 academic papers. He is mainly engaged in heat treatment and deformation process of high strength aluminum alloy. At present, he is a failure analysis expert of Chines Failure Analysis Institution of CMES. |
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1 张航, 何克准, 张江斌, 等.金属热处理, 2019, 44(6), 169. 2 张彦民. 热加工工艺, 2020, 49(24), 1001. 3 宁爱林, 刘志义, 等. 金属热处理, 2006, 31(9), 22. 4 王能均. 铝加工, 2015(6), 16. 5 郑欣. 金属热处理, 2012, 37(11), 99. |
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