Effect of grain size on high temperature deformation of AZ31 alloy

作者：Spigarelli S^*; El Mehtedi M; Ciccarelli D; Regev M

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2011, 528(22-23): 6919-6926.

DOI：10.1016/j.msea.2011.05.032

• Magnesium alloys
• Plasticity
• Microstructure

The effect of grain size on the high temperature mechanical response of the AZ31 magnesium alloy has been investigated by a comparative analysis of the data obtained in the present study and of several other literature results. The basis of the analysis was a phenomenological description, which took into account the existence of two well defined regimes, the first characterized by a n = 3 stress exponent, and the second described by a modified form of the Garofalo equation, indicating the transition from a viscous-glide to climb as rate controlling mechanisms. The description was modified by introducing a further parameter, the grain size; after this correction, the resulting equations were found to give an excellent description of the weak but non-negligible effect of the grain size on the creep response of the alloy.

• 出版日期2011-8-25