Effect of Heavy Strain Rolling and Homogenization on Mechanical and Damping Properties of Mg-4Sn-1Mn Alloy

Author of the article:ZHANG Hao1 , FENG Xuhui2 , SUN Youping2 , WAN Siyu2 , FENG Xuhuang3

Author's Workplace：1. School of Mechanical and Electrical Engineering, Changsha University, Changsha 410022, China; 2. School of Mechanical and Traffic Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China; 3. School of Textile Engineering and Science, Zhejiang Science Technology University, Hangzhou 310018, China

Key Words：magnesium alloy; microstructure; damping behavior; hardness

Abstract：The microstructure, hardness and damping behavior of TM41 magnesium alloy were studied by optical microscope (OM), Vickers hardness, XRD and multifunctional internal friction apparatus. The results show that the microstructure of as-cast, homogenized and rolled TM41 Mg alloys are mainly composed of α-Mg and Mg2Sn phases. The hardness of as-cast TM41 alloy does not change obviously after homogenization, but the hardness increases significantly after large-strain rolling. In the temperature-damping spectrum, the rolled TM41 alloy has a lower critical point, and the homogenized TM41 alloy has a higher critical point. The critical point of as-cast TM41 alloy is not obvious, the critical point of rolled state is caused by dislocation and nail release, and the critical point of homogenization is caused by grain boundary sliding. The critical point is not obvious because of the second nailing action of the as-cast structure to the grain boundary. The damping peak of rolled state is recrystallization damping peak