Mechanism of Grain Refinement in Mg-Al Alloys with Carbon Inoculations

被引：1
|
作者：
Huang, Yuanding [1 ]
Zheng, Xiuhua [1 ]
Kainer, Karl Ulrich [1 ]
Hort, Norbert [1 ]
机构：
[1] GKSS Forschungszentrum Geesthacht GmbH, MagIC Magnesium Innovat Ctr, Max Planck Str 1, D-21502 Geesthacht, Germany
来源：
NEW FRONTIERS IN LIGHT METALS | 2010年
关键词：
D O I：
10.3233/978-1-60750-586-0-451
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Previous Al4C3 nuclei hypothesis cannot explain the grain refinement mechanism of Mg-Al alloys inoculated by carbon because this nucleant is impossible to form during solidification. In the present investigation a ternary compound Al2MgC2 was identified. It has a closer crystal structure to Mg than Al4C3. In the centre of grains, one or more "hillocks" with Al, Mn and C-enrichment were observed. A novel grain refinement mechanism is suggested to explain the grain refinement of Mg-Al alloys with carbon inoculations.
引用
收藏
页码：451 / 460
页数：10
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