Thermodynamic consideration of antiferromagnetic transition on fcc(gamma)-> hcp(epsilon) martensitic transformation in Fe-Mn-Si shape memory alloys

Authors
Jin, XJ Hsu, TY Xu, ZY
Citation
Xj. Jin et al., Thermodynamic consideration of antiferromagnetic transition on fcc(gamma)-> hcp(epsilon) martensitic transformation in Fe-Mn-Si shape memory alloys, MATER CH PH, 61(2), 1999, pp. 135-138
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS CHEMISTRY AND PHYSICS
ISSN journal
02540584 → ACNP
Volume
61
Issue
2
Year of publication
1999
Pages
135 - 138
Database
ISI
SICI code
0254-0584(19991015)61:2<135:TCOATO>2.0.ZU;2-5
Abstract
On the basis of the empirical equations of Fe-Mn system and experimental in formation, T-N(gamma) and T-N(epsilon), Neel temperatures of fcc(gamma) and hcp(epsilon) phases in Fe-Mn-Si shape memory alloys have been evaluated as follows: T-N,FeMn,Si(gamma) = 67x(Fe) + 540x(Mn) [761 + 689(x(Fe) - x(Mn)) ]850x(Si); T-N,FeMnSi(epsilon) = 580x(Mn). Mn increases and Si decreases th e Neel temperature of austenite. The antiferromagnetic transition influence s the Gibbs energy of fcc(gamma) and hcp(epsilon) phases in Fe-Mn-Si alloys . Therefore, addition of Si increases the driving force of martensitic tran sformation in Fe-Mn-Si alloy. (C) 1999 Elsevier Science S.A. All rights res erved.