| METALS AND METAL MATRIX COMPOSITES |
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Impact of Annealing Duration on Microstructure and Properties of Al-1.0Mg
Aluminum Alloy Processed by High Pressure Torsion |
| WANG Zibo, LIU Manping, JIANG Kui, QIN Xi, ZHANG Yong, WANG Shengnan, CHEN Jian
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| Jiangsu Province Key Laboratory of High-end Structural Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 |
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Abstract Al-1.0Mg aluminum alloy was processed by high pressure torsion (HPT) and annealed at 195 ℃. The thermal stability of the alloy was investigated by microhardness tests, X-ray diffraction (XRD) analysis and transmission electron microscope (TEM). The results indicated that the hardness of HPT Al-1.0Mg alloy decreased by 21.6%,27.2% and 34.4% after annealing for 10 min,30 min and 90 min compared to the HPT Al-1.0Mg alloy without annealing. With the extension of annealing duration, the macroscopic stress gradually eliminated, the lattice distortion in the matrix gradually decreased, and the grain size of the alloy after annealing treatment increased steadily, while the speed of hardness reduction slowed down. The hardness of HPT Al-1.0Mg alloy after annealing at 195 ℃ for 90 min still remained as high as 82HV, which is over two times of that of the undeformed alloy.
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Published: 31 January 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (U1710124), Major Projects of Natural Science Research in Universities in Jiangsu Province(14KJA430002). |
| About author:: Zibo Wang received his M.S. degrees in June 2018 from Jiangsu University in engineering. Focusing on the research of microstructure and thermal stability of pure Al and Al-Mg alloys processed by high pressure torsion.Manping Liu received his Ph. D. degree from Institute of Materials of Shanghai Jiaotong University in 2004. He has been engaged in the research of severe plastic deformation aluminum alloy and magnesium alloy nanostructure materials. He participated in more than 20 scientific research projects including the National Natural Science Foundation of China and the 863 Program of the Ministry of Science and Technology. |
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2019, Vol. 33 
