论文部分内容阅读
研究了不同含量Al,Ca元素对镁合金显微组织及蠕变性能的影响.能谱分析(XEDS)、金相显微镜(OM)及扫描电镜(SEM)观察表明,Al是镁合金中β相的组成元素,镁合金中晶界处β相Mg17Al12随Al含量的增加而增加,呈网状分布的Mg17Al12相分布越均匀加入碱土元素Ca后Mg17Al12转化为Al2Ca,强化相颗粒Al2Ca有效地阻滞了位错沿晶界的攀移和滑移,提高了镁合金的高温抗蠕变性能.
The effects of Al and Ca on the microstructure and creep properties of magnesium alloy were studied.The results of energy dispersive spectroscopy (XEDS), optical microscope (OM) and scanning electron microscope (SEM) , The β phase Mg17Al12 in the grain boundaries of magnesium alloy increases with the increase of Al content. The more homogeneously distributed Mg17Al12 phase in the magnesium alloy is, the more Mg17Al12 is transformed into Al2Ca and the Al2Ca phase is effectively blocked The displacement and slip of the dislocations along the grain boundaries improve the high temperature creep resistance of the magnesium alloy.