Paper Title:
Phase and Morphological Transformation of Preformed AZ91D Magnesium Alloys in Remelting
  Abstract

The phase and morphological transformation during the remelting process was investigated by isothermal soaking and rapidly quenching of preformed AZ91D magnesium alloys in semisolid state. It was revealed that the morphological transformation of preformed alloys is crucial to obtain homogenously fine spheroidal grains and affect the final forming ability. The transformation is divided into two stages, local remelting of the whole experiment and partial remelting of the respective grains, which behave as liquid bands and liquid cells structures, respectively. In the partial melting, the lower melting point phase, β-Mg17Al12, diffused to the grains boundary and center of the grains and separated to Al2Mg and Mg. The Al2Mg and Mg phases with lower melting points melt into cells structures. The final microstructure of the remelting experiments is composed of cells structures, spheroidal grains and liquid phase.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
473-476
DOI
10.4028/www.scientific.net/MSF.475-479.473
Citation
M.-X. Xia, H. Zheng, S. Yuan, J. G. Li, "Phase and Morphological Transformation of Preformed AZ91D Magnesium Alloys in Remelting", Materials Science Forum, Vols. 475-479, pp. 473-476, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jeong Min Kim, Ki Duk Seong, Joong Hwan Jun, Ki Tae Kim, Woon Jae Jung
Abstract:Semi-Solid Al-5%Mg-3%Zn-1%Mn alloys with or without 0.2%Zr were prepared by the isothermal heating of either cast ingot or extruded billet....
284
Authors: Lidia Lityńska-Dobrzyńska, Patrick Ochin, Anna Góral, Marek Faryna, Jan Dutkiewicz
Abstract:The effect of rapid solidification on the microstructure of Al-Zn-Mg-Cu alloys with 8 wt.% Zn-2 wt.% Mg-2.3 wt.% Cu and 0.2 or 0.5 wt.% of Zr...
42
Authors: Zheng Tian, Zhan Yi Cao, Jian Meng
Abstract:The effect of yttrium addition and heat treatment on the mechanical properties and microstructure of AM60 magnesium alloy have been...
1319
Authors: Ying Bo Zhang, Hong Gao, Gao Feng Quan, Zhao Ming Liu
Metal Alloy Materials
Abstract:The microstructures and mechanical properties of quasicrystal reinforced Mg-Al-Zn-Y alloys with different Y and Zn contents were...
697
Authors: Qing Shan Yang, Bin Jiang, Xiao Yong Huang, Xiao Ke Li, Fu Sheng Pan
Abstract:The inoculation effect of Al2Ca intermetallic compound on microstructure evolution was examined performed on as-cast AZ31 and AZ61...
383