Sello, M.P.Stumpf, Waldo E.2016-12-092016-12-092011-01Sello, MP & Stumpf, WE 2011, 'Laves phase precipitation and its transformation kinetics in the ferritic stainless steel type AISI 441', Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, vol. 528, no. 3, pp. 1840-1847.0921-5093 (print)1873-4936 (online)10.1016/j.msea.2010.09.090http://hdl.handle.net/2263/58384Electrolytic extraction followed by XRD analysis of precipitates after isothermal annealing of an AISI 441 ferritic stainless steel between 600 and 850 ◦C produced the time–temperature–precipitation (TTP) diagram for the Fe2Nb-Laves phase. The TTP diagram shows two classical C noses, the first one between 750 and 825 ◦C and the second one, estimated to be close to 650–675 ◦C. TEM analyses show two independent nucleation mechanisms, i.e. at about 600 ◦C nucleation takes place on dislocations but above 750 ◦C, grain boundary nucleation is dominant. The measured solvus temperature of 875 ◦C for Fe2Nb in this steel is 50 ◦C higher than predicted by Thermo-Calc®. Kinetic modelling at 800 ◦C agreed well with the experimental results for a surface energy of 0.435 J m−2 and an initial particle center-to-center separation distance on grain boundaries of about 0.2 m.en© 2010 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Materials Science and Engineering: A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Materials Science and Engineering : A, vol. 528, no. 3, pp. 1840-1847, 2011. doi : 10.1016/j.msea.2010.09.090.Laves phase (Fe2Nb)Johnson–Mehl–Avrami–Kolmogorov (JMAK)Transformation kineticsLaves phase precipitationFerritic stainless steel type AISI 441Time–temperature–precipitation (TTP)Postprint Article