2026-04-17T12:11:25Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/127292024-06-18T11:49:32Zcom_2072_452955com_2072_2054col_2072_453063

00925njm 22002777a 4500 dc Mhadhbi, M. author Khitouni, Mohamed author Escoda i Acero, Ma. Lluïsa author Suñol Martínez, Joan Josep author Dammak, Mohamed author info:eu-repo/date/embargoEnd/2026-01-01 info:eu-repo/date/embargoEnd/2026-01-01 2011-02-17 In the present study high energy mechanical milling followed by cold temperature pressing consolidation has been used to obtain bulk nanocrystalline FeAl alloy. Fully dense disks with homogenous microstructure were obtained and bulk material show grain size of 40 nm. Thermal stability of the bulk material is studied by XRD and DSC techniques. Subsequent annealing at a temperature up to 480 °C for 2 h of the consolidated samples enabled supersaturated Fe(Al) solid solution to precipitate out fine metastable Al5Fe2, Al13Fe4 and Fe3Al intermetallic phases. Low temperature annealing is responsible for the relaxation of the disordered structure by removing defects initially introduced by severe plastic deformation. Microhardness shows an increase with grain size reduction, as expected from Hall-Petch relationship at least down to a grain size of 74 nm, then a decrease at smallest grain sizes. This could be an indication of some softening for finest nanocrystallites. The peak hardening for the bulk nanocrystalline FeAl is detected after isochronal ageing at 480 °C. © 2010 Elsevier B.V. All rights reserved. Financial support from MICYT MAT2006-13925-C02-02 (FEDER) project is acknowledged. http://hdl.handle.net/10256/12729 Compostos intermetàl·lics -- Aliatges Intermetallic compounds -- Alloys Microestructura Microstructure Materials nanoestructurats Nanostructured materials Cristal·lografia de raigs X X-ray crystallography Materials nanoestructurats -- Propietats mecàniques Nanostructured materials -- Mechanical properties Microstructure evolution and mechanical properties of nanocrystalline FeAl obtained by mechanical alloying and cold consolidation