Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (1): 1-6.DOI: 10.1016/S1006-7191(08)60063-0

• Research paper •     Next Articles

Precipitation and responding damping behavior of heat-treated AZ31 magnesium alloy

Diqing WAN,Jincheng WANG,Gaifang WANG,Lin LIN,Zhigang FENG   

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072,China
  • Received:2008-01-17 Revised:2008-07-07 Online:2009-02-25 Published:2009-10-10
  • Contact: Diqing WAN

Abstract:

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 ℃ for AZ31 magnesium alloy, which is related to the β-Mg17Al12 phase dissolution.

Key words: Magnesium alloys, Damping behavior, Precipitation, G-L model, Damping peak