L. Ge’s scientific contributions

Effects of Mn content on homogenized microstructure, annealed mechanical properties and microstructure of Al-Mg aluminum alloy were studied. The results show that the dispersoids precipated from the homogenization microstructure are near equiaxial particles for the two alloys, the size of the dispersoids is about 1 μm. The number of dispersoids precipated from homogenization structure of the low Mn content alloy is less than that of the high Mn content alloy. When annealed at 480℃ for 10 s, yield strength of the high Mn content alloy and the low Mn content alloy are 113 MPa and 84 MPa, their elongation are 23% and 26% and the recrystallized average sizes are 17 μm and 27 μm, respectively. With the increase of Mn content, the strength of the alloy increases, the elongation reduces and the annealed grain size decreases. With prolonging the annealing holding time, the yield strength of the two alloys both decreases, while the recrystallization grain size and the elongation of the two alloys increase. © 2017, Editorial Office of "Jinshu Rechuli". All right reserved.