%0 Journal Article
%T Landau theory of martensitic transformation in Fe-Mn-Si based alloys<br>
%A WAN Jianfeng
%A CHEN Shipu
%A XU Zuyao
%A <br>
%J 科学通报(英文版)
%D 2002
%I 
%X Considering the features of martensitic transformation in Fe-Mn-Si based alloys, the Landau theory is established by introducing the density of stacking faults as a new order parameter ηand the corresponding free energy function. By using such an order parameter, the stacking fault mechanism of the nucleation and growth for the γ(fcc)→ε(hcp) martensitic transformation can be reasonably explained, and a further detailed mechanism is proposed. The stacking faults are generated and overlapped in an irregular form at the beginning and then becoming regular to create some transition structures till a stable phase forms at a certain temperature. The importance of the interface soliton is to complete the transformations into various structures of martensite but not the twinned one. The thermodynamics of fcc→hcp transformation and those between different transition structures are described by the free energy function established in the present note.
%K order parameter
%K density of stacking fault
%K Landau theory
%K soliton
%K Fe-Mn-Si alloys
%K mechanism of martensitic transformation
%K transition phase<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=18BDE878B60CFE37A32C9CD2AB098C40&yid=C3ACC247184A22C1&vid=F4B561950EE1D31A&iid=94C357A881DFC066&sid=389DA78D878702A9&eid=DDEED1BDDBFAA8A7&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=1&reference_num=14