喷射沉积2%Nd镁合金热变形过程组织演变  

Microstructure Evolution of Spray-Deposited Magnesium Alloys Containing 2%Nd during Hot Deformation

作　　者：李振亮[1] 任慧平[1] 金自力[1] 张婧[1] 陈伟[2] 翟景[2] 

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《稀有金属材料与工程》2014年第11期2728-2732,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51364032)

摘　　要：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。The billets of Mg-9A1-3Zn-1Mn-6Ca-2Nd alloy were produced by a spraying deposition method （the Osprey process）. The relationship between microstructure of Nd-rich nanoscale particles and recrystallization was studied during pre-deformation and compression deformation. The results indicate that the twin substructure is found to exist in the hot-extruded magnesium alloys; when the alloy is compressed, nonbasal slip is the main deformation mechanism. The nanometer scale Nd-rich particles are determined as C 15-（Ca,Nd）Al2 Laves phase. There are dislocation networks surrounding the second particles and they can influence the peak stress of recrystallization

关 键 词：镁合金 再结晶 含Nd相 孪生 位错胞 

分 类 号：TG146.22[一般工业技术—材料科学与工程]