Development of non-flammable high strength extruded Mg-Al-Ca-Mn alloys with high Ca/Al ratio  

作　　者：Guosong Han Ding Chen Gang Chen Jianghua Huang 

机构地区：[1]College of Materials Science and Engineering,Hunan University

出　　处：《Journal of Materials Science & Technology》2018年第11期2063-2068,共6页材料科学技术（英文版）

基　　金：supported by the Boeing Company [No. 2015SDB-127]

摘　　要：A series of non-flammable high strength Mg-Al-Ca-Mn alloys with high Ca/Al ratio were fabricated by water-cooled casting and hot extrusion. Microstructure and mechanical properties were investigated to study the effect of hot extrusion. The experimental results showed that hot extrusion significantly improved the mechanical properties by grain refinement and precipitates. Ignition temperature was measured by furnace test, and the highest temperature is up to approximately 1040℃ due to the composite oxide layer consisting of CaO and MgO. In addition, a laboratory-scale flame test was conducted to evaluate the flammability of smaller specimens. These alloys exhibited marvelous flame resistance attributed to the protective effect of dense and stable oxide film.A series of non-flammable high strength Mg-Al-Ca-Mn alloys with high Ca/Al ratio were fabricated by water-cooled casting and hot extrusion. Microstructure and mechanical properties were investigated to study the effect of hot extrusion. The experimental results showed that hot extrusion significantly improved the mechanical properties by grain refinement and precipitates. Ignition temperature was measured by furnace test, and the highest temperature is up to approximately 1040℃ due to the composite oxide layer consisting of CaO and MgO. In addition, a laboratory-scale flame test was conducted to evaluate the flammability of smaller specimens. These alloys exhibited marvelous flame resistance attributed to the protective effect of dense and stable oxide film.

关 键 词：Magnesium alloys Extrusion Mechanical properties FLAMMABILITY 

分 类 号：TG379[金属学及工艺—金属压力加工]