Micro arc oxidation and electrophoretic deposition effect on damping and sound transmission characteristics of AZ31B magnesium Alloy  

作　　者：罗智 郝志勇 蒋百灵 葛延峰 郑旭 

机构地区：[1]Department of Energy Engineering, Zhejiang University [2]School of Materials Science and Engineering, Xi'an University of Technology

出　　处：《Journal of Central South University》2014年第9期3419-3425,共7页中南大学学报（英文版）

基　　金：Project(2011BAE22B05)supported by National Technology R&D Program in the 12th Five year Plan of China;Project(2011DFA50900)supported by the Canada-China-USA Collaborative Research&Development Project;Project(51071121)supported by the National Natural Science Foundation of China

摘　　要：Micro arc oxidation(MAO) and electrophoretic deposition(EPD) process are employed to fabricate a dense coating on magnesium alloy to protect it from corrosion in engineering application. The EPD film changes the damping characteristic of magnesium alloy, and both the MAO and EPD process change the bending stiffness of samples being treated. Damping loss factor(DLF) test and sound transmission experiments were carried out for AZ31 B magnesium alloy with coating fabricated by MAO and EPD processes. The results indicate that DLF is improved in frequency range from 0-850 Hz. Bending stiffness of the samples is improved with MAO and EPD treatment. As a result, the sound transmission loss(LST) is improved in the stiffness control stage of the sound transmission verse frequency curve. To the samples by electrophoresis process, the LST is improved in frequency range from 2500-3200 Hz, because the damping loss factor is improved with EPD process. The results are useful for the surface treatment to enhance the damping loss factor, LST and widespread application of magnesium alloy while improving the corrosion resistance.Micro arc oxidation（MAO） and electrophoretic deposition（EPD） process are employed to fabricate a dense coating on magnesium alloy to protect it from corrosion in engineering application. The EPD film changes the damping characteristic of magnesium alloy, and both the MAO and EPD process change the bending stiffness of samples being treated. Damping loss factor（DLF） test and sound transmission experiments were carried out for AZ31 B magnesium alloy with coating fabricated by MAO and EPD processes. The results indicate that DLF is improved in frequency range from 0-850 Hz. Bending stiffness of the samples is improved with MAO and EPD treatment. As a result, the sound transmission loss（LST） is improved in the stiffness control stage of the sound transmission verse frequency curve. To the samples by electrophoresis process, the LST is improved in frequency range from 2500-3200 Hz, because the damping loss factor is improved with EPD process. The results are useful for the surface treatment to enhance the damping loss factor, LST and widespread application of magnesium alloy while improving the corrosion resistance.

关 键 词：magnesium alloy micro arc oxidation electrophoretic deposition damping loss factor sound transmission loss bending stiffness 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG146.22[金属学及工艺—金属学]