%0 Journal Article
%T Microstructure and Mechanical Properties of Mg-Al-Ca-Nd Alloys Fabricated by Gravity Casting<br>
%A Hyeon-Taek Son
%A Jae-Seol Lee
%A Ik-Hyun Oh
%A Chang-Seog Kang
%A <br>
%J 材料科学技术学报
%D 2008
%I 
%X The aims of this study are to investigate the effects of Nd addition in the Mg-Al-Ca alloys on microstructure and mechanical properties. Microstructure of as-cast Mg-5Al-3Ca alloy containing Nd consists of α-Mg matrix,eutectic phase and Al-Nd rich intermetallic compound. As Nd addition was increased, α-Mg matrix morphology was changed from dendritic to equiaxed grains and average value of grain size was decreased. Nd addition to Mg-5Al-3Ca based alloys resulted in the formation of Al-Nd rich intermetallic compounds at grain boundary and α-Mg matrix grains. And these Al-Nd rich intermetallic compounds were dispersed homogeneously. In these alloys, two kinds of eutectic phases were observed, i.e. coarse irregular-shape structure at grain boundary and fine needle-shape structure in the α-Mg matrix grain. It is found that the ultimate strength showed the maximum value of 271 MPa at Mg-5Al-3Ca-2Nd alloy and elongation was decreased as the addition of Nd was increased.
%K Mg-Al-Ca alloy
%K Neodymium (Nd)
%K Rare earth element<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=55AD48E1AFA07C34638E746607423E1B&yid=67289AFF6305E306&vid=B91E8C6D6FE990DB&iid=CA4FD0336C81A37A&sid=CD775AE9DDBD7B53&eid=7E8E8B150580E4AB&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=10