%0 Journal Article
%T CELLULAR TO DENDRITIC TRANSITION OF DIRECTIONALLY SOLIDIFIED Al-Cu ALLOYS UNDER DIFFERENT GROWTH VELOCITIES<br>变速生长条件下Al－Cu合金的定向凝固枝晶组织
%A XU Daming
%A CAO Fuyang
%A LI Qingchun
%A WANG Yongqian
%A ZHANG Baoyou
%A <br>徐达鸣
%A 曹福洋
%A 李庆春
%A 王永前
%A 张宝友
%J 金属学报
%D 1995
%I 
%X Dendrite evolution from cellular structures of directionally solidified Al-2wt-% Cu and Al-4 wt-% Cu specimens under step and linear change of displacement velocity was studied with an improved experiment apparatus of directional solidification.The experimental results show that, although the dynamic process of cellular to dendritic transition becomes slow with decrease in the velocity change of specimen displacement,the instability and branching of the cellular structure will rapidly develop a dendritic strucutre after a certain disturbance of the cellular morphology.These dendrites could have various morphologies which are related to the acceleration.
%K dendritic growth
%K cellular to dendritic transition
%K dendrite morphology
%K directional solidification
%K Al-Cu alloys<br>枝晶生长，胞－枝晶转变，枝晶形态，定向凝固，Al－Cu合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=1231204C77961A685B33EA4B37ABD082&yid=BBCD5003575B2B5F&vid=4AD960B5AD2D111A&iid=708DD6B15D2464E8&sid=3054A11AD1D7E34A&eid=B7B25E832E7F23D8&journal_id=0412-1961&journal_name=金属学报&referenced_num=1&reference_num=1