Microstructure and solidification behavior of permanent-mould-cast Mg-9Li-3Al-xSr magnesium alloy

摘要：

Mg-9Li-3Al-xSr (x=0wt％, 1.0wt％, 2.0wt％, 2.5wt％) magnesium alloys with different ingot sizees were prepared in furnace under the protection of argon atmosphere. The as-cast microstructure and solidification characteristics of Mg-9Li-3Al-xSr alloys were experimentally examined using optical microscopy, scanning electron microscopy and X-ray diffraction. The results indicate that Mg-9Li-3Al-xSr alloys are composed of α-Mg, β-Li, Mg17Al12, AlLi and Al4Sr phase. The grains of Φ10mm ingots are much smaller and the compound phase distributes much more uniformly than Φ90mm ingots. Solidification process of Mg-9Li-3Al-xSr alloys follows the principle of eutectic solidification. The microstructure of the series as-cast alloys is typical rodlike eutectic microstructure.

关键词： Mg-Li alloy Strontium Microstructure Solidification behavior

作者: PENG Xiaodong YANG Yan WEI Qunyi XIE Weidong NING Xu

作者单位: College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China National College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 247-252

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）