%0 Journal Article
%T Directional solidification of TiAl alloys using a polycrystalline seed<br>抽拉速率对Ti-43Al-3Si合金籽晶法定向凝固组织的影响
%A LUO Wenzhong
%A SHEN Jun
%A LI Qinglin
%A MAN Weiwei
%A ZHENG Xunqiang
%A LIU Lin
%A FU Hengzhi
%A <br>罗文忠
%A 沈军
%A 李庆林
%A 满伟伟
%A 郑循强
%A 刘林
%A 傅恒志
%J 金属学报
%D 2006
%I 
%X Directional solidification (DS) of Ti-46Al and Ti-43Al-3Si alloys using a polycrystalline seed material of Ti-43Al-3Si by self-made EMCS experimental apparatus with wide range of velocity has been studied. Successful DS ingots were obtained with fully lamellar microstructure parallel to longitudinal axis when the growth rates increased from 60 to 120mm/h. The ingot grown at 60mm/h exhibited typical lamellar microstructure aligned along the growth direction from the seed crystal up to the end part of ingot. On the contrary, as the growth rate increased, the orientation of lamellar microstructure changed beyond the transition point.
%K TiAl<br>定向凝固
%K 抽拉速率
%K 籽晶法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=94544E886EA31466&yid=37904DC365DD7266&vid=ECE8E54D6034F642&iid=59906B3B2830C2C5&sid=5C10CB62DEB8898B&eid=D92306F676C2377C&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=15