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利用喷射沉积技术制备Mg-9Al-3Zn-1Mn-6Ca-2Nd镁合金沉积坯,对其进行挤压预变形和二次压缩变形,重点研究热变形过程中纳米级含Nd第二相微观组织结构与再结晶之间的关系。结果表明:热挤压态镁合金中有孪晶存在,二次热压缩过程中非基面滑移是主要的变形机制;(Ca,Nd)Al2结构的C15型Laves相是Nd在镁合金中的纳米级第二相,在它们周围形成的密集位错网能影响再结晶的峰值应力大小。
Deposition and secondary compression deformation of Mg-9Al-3Zn-1Mn-6Ca-2Nd magnesium alloy were prepared by spray deposition. The microstructure of nanocrystalline Nd-containing second phase during thermal deformation was mainly studied. Relationship with recrystallization. The results show that twins exist in the hot-extruded Mg alloy and non-basal slip is the main deformation mechanism during the second hot compression. The C15-type Laves phase of (Ca, Nd) Al2 is Nd in the magnesium alloy Of the nanoscale second phase, dense dislocation networks formed around them can influence the magnitude of the peak stress of recrystallization.