Materials Reports  2020, Vol. 34 Issue (Z2): 362-364 |
| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Homogenization Process on Microstructure and Properties of Large Size 7075 Aluminum Alloy |
| CHAO Daiyi1,2, YU Fang1, LI Hongping3, GAO Zhenwen1, ZHANG Qian2, LYU Zhengfeng1, CHENG Rence1
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1 Shandong Nanshan Aluminum Co., Ltd., Longkou 265713, China
2 Yantai Nanshan University,Yantai 265713, China
3 Shanghai Aircraft Design and Research Institute, Shanghai 201210, China |
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Abstract The effects of different homogenization processes on the microstructure of 7075 aluminum alloy ingot and the properties of rolled sheet were studied in this paper. The results show that: the as-cast structure of the alloy is mainly composed of Al matrix+Mg(Zn, Cu)2 phase non-equilibrium eutectic phase. After homogenization at 465 ℃/24 h, the dendrite structure in the alloy partially disappeared, and the low-melting point phase was not fully dissolved. After 465 ℃/24 h+478 ℃/8 h homogenization, eutectic structure is basically eliminated, and the residual phase is mainly the rich-Fe containing phase, with excellent homogenization effect. After different soaking ingot is rolled into thin plate, the T6 state mechanics of the two-stage homogenization is optimal, with tensile strength is 533.5 MPa, yield strength is 455 MPa and elongation is 16.5%.
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Published: 08 January 2021
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| About author:: 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. 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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