Mg-Al-Zn（RE）镁合金轧制变形行为及强化机制

Rolling Deformation and Strengthening Mechanism of Mg-Al-Zn(RE) Magnesium Alloys

摘要:

针对典型的Mg-Al-Zn系AZ31变形镁合金以及添加了0．8％Ce和0．8％Nd的AZ31镁合金，研究了合金在轧制加工过程中组织与性能的变化以及稀土元素对合金的影响，并探讨了合金的主要强化机制。结果表明：Mg-Al-Zn系合金轧制加工过程中加丁硬化严重，容易发生脆性断裂。添加稀土元素后的合金强度和塑性都有明显提高，稀土元素可形成Al4ce等含稀土化合物，起到细晶强化和第二相强化作用。

Abstract:

The rolling Deformation and strengthening mechanism of typical wrought magnesium alloy AZ31, AZ31(0.8%Ce) and AZ31(0.8%Nd) were studied. The microstructures, mechanical properties and the effects of rare earth Ce and Nd on AZ31 alloy were investigated. The results show that the work hardening of experimental alloys is serious and brittle breaking happen easily. Doping of rare earth can improve both the strength and ductility of AZ31 Alloy. The refine grain strengthening, working hardening and rare earth phase strengthening are the main strengthening mechanism of A231 series alloy.