Effects of Aging Process on the Damping Performance of ZK60 Magnesium Alloys Prepared by Large Strain Rolling

Materials

Gang Chen¹  Xuhui Feng²  Jiangmei He²  Youping Sun²  Siyu Wan² 

[1] School of Materials Science and Engineering, Hunan University, Changsha 410082, China;School of Mechanical and Transportation Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China;

关键词: ZK60 magnesium alloy;    aging treatment;    second phase;    damping performance;   

DOI  :  10.3390/ma13235574

来源: DOAJ

【 摘 要 】

In this study, the effects of an aging treatment (T5) and a solution + aging treatment (T6) on the microstructure and damping properties of a ZK60 magnesium alloy prepared by large strain rolling (LSR) were studied by an optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and dynamic thermomechanical analysis (DMA). The results showed that both the T5 and T6 processes had a great impact on the microstructure and damping properties of the ZK60 magnesium alloy. With the increase in aging time, the grain size was basically unchanged, and the amount of the second phase increased, resulting in a gradual decrease in the damping performance. However, compared with the damping performance of the un-aged ZK60 magnesium alloy, the damping performance of the 4 h-aged ZK60 magnesium alloy was enhanced. At the same aging time, the increase in the aging temperature promoted the precipitation of the second phase, thereby reducing the damping performance of the ZK60 magnesium alloy. It was found that the T6-treated ZK60 magnesium alloy had a larger grain size, which led to a better damping performance; in addition, the T6-treated ZK60 magnesium alloy exhibited a damping plateau, which was determined by the distribution and amount of the second phase.

【 授权许可】

Unknown