%0 Journal Article
%T STUDY ON GRANULATION MECHANISMS OF γ+(Fe,Mn)3C EUTECTICS IN AUSTENITE STEEL COMPOSITES
STUDY ON GRANULATION MECHANISMS OF γ＋（Fe,Mn）3C EUTECTICS IN AUSTENITE STEEL COMPOSITES
%A GFLiang
%A ZMXu
%A QCJiang
%A JGLi
%A
G.F. Liang
%A Z.M. Xu
%A Q.C. Jiang and J.G. Li School of Materials Science and Technology
%A Shanghai Jiaotong University
%A Shanghai
%A China
%A School of Materials Science
%A Jilin University
%A Changchun
%A China
%J 金属学报(英文版)
%D 2003
%I
%X Results presented in this paper contribute to investigation of the granulation mechanisms of γ+(Fe, Mn)3C eutectics in the austenite matrix composites (abbreviated EAMC). The specimens corresponding to the nominal composition of eutectic with controlled RE(Ce)-Mg agent modifier additions have been unidirectional solidified with a constant growth rate of 2.18μm/s at a fixed temperature gradient of 800K/cm using vertical Bridgeman method. With the RE-Mg agent modifier, the transition of solid/liquid (S/L) interface from columnar to dendrite (CDT), refinement and developed branching of γ and (Fe, Mn)3C phases in the eutectics, and the transition of growth style from faceted-nonfaceted (F/NF) to nonfaceted-nonfaceted (NF/NF)for γ and (Fe, Mn)3C phases in the eutectic have been observed and investigated theoretically. Those can explain the granulation of γ+(Fe, Mn)3C eutectics in the as cast because the roundness increases with the developed lateral branching of primary austenite dendrites, refinement of eutectics, and NF/NF growth of γ and (Fe,Mn)3 C phases in the eutectic.
%K composite
%K RE-Mg agent
%K granulation
%K unidirectional solidifica-tion
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=266F27A2A0E57ACA8EEF4A09EFB8905F&yid=D43C4A19B2EE3C0A&vid=7801E6FC5AE9020C&iid=B31275AF3241DB2D&sid=78BF76CF5B7CB0F2&eid=522844664D9E629A&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=15