喷射成形高镁铝合金的组织特征及其断裂行为  

Microstructure and fracture behavior of the spray-forming high magnesium aluminum alloy

作　　者：孙廷富[1] 孙宇红[1] 段战军 李建华 郭珉[1] 范云波[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]西安北方华山机电有限公司,陕西西安710043 [3]北电网络,北京100006

出　　处：《兵器材料科学与工程》2006年第5期41-44,共4页Ordnance Material Science and Engineering

基　　金：总装备部基金资助项目

摘　　要：采用喷射成形技术制备了高镁铝合金,并挤压致密化与T4热处理强化。研究了高镁铝合金的显微组织特点和拉伸断裂方式。结果表明:喷射成形工艺可显著细化高镁铝合金的晶粒,无宏观偏析,显微组织为细小均匀的等轴晶,晶内均匀分布着细小的弥散相;断裂形式呈韧性断裂,断口以韧窝为主。High magnesium aluminum alloy was prepared by spray-forming, and extruded to densification and strengthened by T4 heat treatment. The microstructure and fracture behavior of the high magnesium aluminum alloy were studied. The result in dicates that the spray-forming could refine the grain structure without macrosegregation, the microstructure was the uniformly distributed equiaxed fine grain with fine dispersed phase in it. The fractograph exhibited typical ductile dimple fracture pattern.

关 键 词：喷射成形 高镁铝合金 显微组织 等轴晶 弥散相 韧性断裂 

分 类 号：TG146[一般工业技术—材料科学与工程]