期刊
ACTA METALLURGICA SINICA-ENGLISH LETTERS
卷 22, 期 1, 页码 1-6出版社
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1016/S1006-7191(08)60063-0
关键词
Magnesium alloys; Damping behavior; Precipitation; G-L model; Damping peak
资金
- National Natural Science Foundation of China [50671083, 50571081]
- Aeronautical Science Foundation of China [04G53042]
- Natural Science Foundation of the Shaanxi Province [2007E101]
Microstructure observation and dynamic mechanical analysis were carried out to investigate the precipitation and responding damping behaviors of AZ31 magnesium alloy. All the strain amplitude-dependent damping curves of the aged alloys are located between the curves of solutionized and as-cast alloys, although they have different critical strain amplitudes. The G-L theory is employed to explain the damping mechanism involving the interaction between the dislocation and the precipitated phase. In addition, a damping peak is observed at temperatures close to 330 degrees C for AZ31 magnesium alloy, which is related to the beta-Mg(17)Al(12) phase dissolution.
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