%0 Journal Article
%T DENDRITIC ARM SPACING AND MICROSEGREGATION OF DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ22 AT V ARIOUS SOLIDIFICATION RATES<br>凝固速率对定向凝固合金DZ22枝晶臂间距和枝晶偏析的影响
%A LIU Zhongyuan
%A LI fianguo
%A FU Hengzhi
%A <br>刘忠元
%A 李建国
%A 傅恒志
%J 金属学报
%D 1995
%I 
%X 采用新研制的超高梯度定向凝固装置，研究了不同凝固速率下定向凝固高温合金ＤＺ２２枝晶臂间距和枝晶偏析。结果表明，冷运速率增大，枝晶臂间距显著细化，枝晶偏析被强烈抑制。当冷运速率为５２．４Ｋ．ｓ＾－１时，一次、二次枝晶臂间距λ１和λ２分别为２８．８和８．４μｍ，Ｎｂ，Ｔｉ，Ａｌ，Ｃｒ，Ｃｏ，Ｗ等元素的偏析比均趋近于１。
%K directionally solidified superalloy
%K solidification rate
%K cooling rate
%K dendritic arm spacing
%K microsegregation<br>定向凝固
%K 凝固速率
%K 枝晶偏析
%K 耐热合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=2FC189D6E856849A7B746D4FB0400F27&yid=BBCD5003575B2B5F&vid=4AD960B5AD2D111A&iid=DF92D298D3FF1E6E&sid=C6EC7357BCACD3A4&eid=2E01F39B6CBD53DE&journal_id=0412-1961&journal_name=金属学报&referenced_num=9&reference_num=5