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Grain Coarsening Behavior of Mg-Al Alloys with Mischmetal Addition by Shuangshou Li; Weichao Zheng; Bin Tang; Daben Zeng; Xutao Guo is a Materials Science article available to read on EtoBox.

What is Grain Coarsening Behavior of Mg-Al Alloys with Mischmetal Addition about?

Small addition of mischmetal (MM) into aluminum alloys can lead to grain refinement. However, it is still uncertain whether the same effect applies to Mg-A1 alloys. This work indicated that small amount of mischmetal addition ranging from 0 . 1 % to 1 . 2 % (mass fraction) did not cause grain refinement in Mg-Al alloys. On the contrary, they tended to coarsen the grains. When added into Mg-Al alloys, MM reacted preferentially with A l to form All MM3 phase. As AlI1MM3 phase mainly distributed within a-Mg grains than at grain boundaries, it had little effect in restricting grain growth. In addition, MM reacted with A18 (Mn , Fe)s or s-AlMn particles to form Al-MM-Mn compounds, thus it reduced the amount of heterogeneous nuclei in the melt and resulted in remarkable grain coarsening.

Who reads Grain Coarsening Behavior of Mg-Al Alloys with Mischmetal Addition?

Author

Shuangshou Li; Weichao Zheng; Bin Tang; Daben Zeng; Xutao Guo

Publisher

Elsevier Science; Elsevier ; The Metallurgical Industry Press; Elsevier BV (ISSN 1002-0721)

Published

2007

Language

EN

Field

Materials Science (Physical Sciences)