This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-01-26 Creation time: 10-17-17 --- Number of references 1 article Settefrati:2011 Solid State Phenomena 2011 172-174 Part 1 760-765 In the present study we focus on the precipitation processes during heating and ageing of beta-metastable phase in the near beta Ti-5553 alloy. Transformation processes have been studied using continuous high energy X-Ray Diffraction (XRD) and electrical resistivity for two different states of the beta-metastable phase. Microstructures have been observed by electron microscopy. Different transformation sequences are highlighted depending on both heating rate and chemical composition of the beta-metastable phase. At low temperatures and low heating rates, the hexagonal omega(iso) phase is first formed as generally mentioned in the literature. Increasing the temperature, XRD evidences the formation of an orthorhombic phase (alpha"), which evolves toward the hexagonal pseudo compact alpha phase. For higher heating rates or for richer composition in beta-stabilizing elements of the beta-metastable phase, omega phase may not form and alpha" forms directly and again transforms into alpha phase. A direct transformation from beta-metastable to alpha phase is observed for the highest heating rate. The formation of the metastable omega(iso) and alpha" phases clearly influences the final morphology of alpha. Département SI2M : Microstructures et Contraintes Brechet, Y and Clouet, E and Deschamps, A and Finel, A and Soisson, F SOLID-SOLID PHASE TRANSFORMATIONS IN INORGANIC MATERIALS, PTS 1-2 Mat & Process Sci & Engn Lab; CEA, Tranverse Programme Adv Mat; French Aerospace Lab; Inst Chem, Natl Ctr Sci Res; French Phase Field Network; Lab Etude Microstructures 1012-0394 10.4028/www.scientific.net/SSP.172-174.760 A.Settefrati E.Aeby-Gautier M.Dehmas G.Geandier B.Appolaire S.Audion J.Delfosse