Research on alloying technique of yttrium on AZ91D magnesium alloy

DOI

10.2991/icmse-15.2015.343How to use a DOI?

Keywords

Magnesium alloy; rare earth; die casting; alloying technique.

Abstract

Effect of alloying techniques of dollop-like yttrium, as-cast and extruded Mg-Y master alloy in AZ91D magnesium alloy on microstructure and the efficiency of alloying was studied by optical microscopy, scanning electron microscopy, XRD and inductively-coupled plasma (ICP) spectroscopy. The as-cast AZ91D-1.2wt.%Y alloys were prepared and yttrium was added by different way at 750ºC . The results showed that the efficiency of alloying achieved less than 50% within 60 minutes when dollop-like yttrium was added. When yttrium was added by as-cast and extruded Mg-25wt. %Y master alloy, the efficiency of alloying was 71.3wt. % and 78.3wt. %, respectively. The efficiency of alloying was improved because the Mg-Y master alloy could melt easily down at casting temperature. The Mg-Y phases were formed in the Mg-Y master alloys. After the as-cast Mg-Y master alloy was extruded, the decrease in Mg-Y particle size and increase in the number of nucleating sizes for Mg led to the microstructure of the as-cast AZ91D-1.15wt. %Y alloy was refined.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yulei Xu
AU  - Kui Zhang
PY  - 2015/12
DA  - 2015/12
TI  - Research on alloying technique of yttrium on AZ91D magnesium alloy
BT  - Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering
PB  - Atlantis Press
SP  - 1888
EP  - 1893
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmse-15.2015.343
DO  - 10.2991/icmse-15.2015.343
ID  - Xu2015/12
ER  -