Paper Title:
The Microstructures of As-Cast Mg-Zr and Mg-Mn Alloys
  Abstract

The as-cast microstructures of two dilute Mg-Zr and three dilute Mg-Mn alloys were studied using optical microscopy and scanning electron microscopy, including EDX analysis. The results show that the as-cast microstructure of the Mg-Zr alloys was composed of non-dendritic, equiaxed Mg grains, with a few Zr particles within the Mg grains and along grain boundaries. The grain size of the Mg-Zr alloy was significantly reduced by the Zr addition and a fine grain structure was achieved when the zirconium concentration was above 0.4wt. %. The as-cast structure of the Mg- Mn alloys contained columnar, dendritic grains. Two types of Mn particles (equiaxed large particles and rod-like or plate-like small particles) were observed in the as-cast Mg-Mn alloys. The volume fraction of particles and the size differences between the large and small particles increased with an increase of Mn concentration.

  Info
Periodical
Materials Science Forum (Volumes 488-489)
Edited by
W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo
Pages
329-332
DOI
10.4028/www.scientific.net/MSF.488-489.329
Citation
J. P. Li, G. W. Lorimer, J. D. Robson, B. Davis, "The Microstructures of As-Cast Mg-Zr and Mg-Mn Alloys", Materials Science Forum, Vols. 488-489, pp. 329-332, 2005
Online since
July 2005
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$32.00
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