%0 Journal Article
%T PULSED MAGNETIC FIELD-INDUCED MARTENSITIC TRANSFORMATION IN AN Fe-21Ni-4Mn ALLOY<br>F6-21Ni-4Mn合金强脉冲磁场诱发马氏体相变的研究
%A SUN Enxi
%A YANG Dazhi
%A XU Zuyao
%A YANG Fumiug
%A ZHAO Ruwen Dalian Institute of Railway Dalian University of Technology Shanghai Jiaotong University Institute of Physics
%A Academia Sinica
%A Beijing professor
%A <br>孙恩喜
%A 杨大智
%A 徐祖耀
%A 杨伏明
%A 赵汝文
%J 金属学报
%D 1990
%I 
%X Magnetic field-induced martensitic transformation in an Fe-2lNi-4Mn(wt-%) alloy with isothermal and athermal martensite transformation kinetics hasbeen studied by magnetization measurement and optical microscopy, applying apulsed ultrahigh magnetic field. The following results were found: a magnetic fieldhigher than a critical one is needed to induce the martensitic transformation aboveM_s. The critical magnetic field increases with increasing temperature, and whenplotted against the temporature difference from M_s, it lies on a straight line notpassing through the origin. This result and thermodynamical analysis suggest thatpulsed magnetic field strongly promotes the athermal martensitic transformation andrestrains tht isothermal one. The influence of magnetic field on martensitic trans-formation in the present Fe-Ni-Mn alloy is mainly due to Zeeman effect. Theentropy change for athermal transformation at M_s, S_Ms~at is obtained to be 4.13J/mol.K. The amount of magnetic field-induced martensites increases linearly withthe maximum strength of pulsed magnetic field. Lath, plate and butterfly martensi-tes are formed under magnetic field.
%K pulsed magnetic field
%K induced martensitic transformation
%K isothermal and athermal transformation kinetics
%K Fe-Ni-Mn alloy<br>脉冲磁场
%K 诱发马氏体相变
%K 等温和变温转变动力学
%K Fe-21Ni-4Mn合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=B009106E7E73151E87C1C1945EEE91B7&yid=8D39DA2CB9F38FD0&vid=96C778EE049EE47D&iid=E158A972A605785F&sid=59906B3B2830C2C5&eid=BCA2697F357F2001&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=1