Kinetics of static recrystallization in the coarse-grained Fe–40 at.%Al–Zr–B alloy

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dc.contributor.authorHanus Pawelcs
dc.contributor.authorSchindler Ivocs
dc.contributor.authorKopeček Jaromírcs
dc.contributor.authorKawulok Petrcs
dc.contributor.authorJabłońska Magdalenacs
dc.contributor.authorHadasik Eugeniuszcs
dc.contributor.authorJóźwik Pawelcs
dc.contributor.authorOpěla Petrcs
dc.contributor.authorPolkowski Wojciechcs
dc.contributor.authorBojar Zbigniewcs
dc.date.accessioned2018-09-25T12:10:33Z
dc.date.available2018-09-25T12:10:33Z
dc.date.issued2017cs
dc.description.abstractThe aim of works was to describe mathematically the kinetics of static recrystallization of the alloy type Fe–40 at.%Al–Zr–B (with 24.6 Al–0.01 B–0.18 Zr–0.01 C in wt.%) with the coarse-grained structure. The microstructure of the laboratory castings made of this extremely brittle alloy was homogenized by hot rolling of the material in the protective capsules and by the long-term annealing at 1200 °C. An initial microstructure with average grain size 0.77 ± 0.27 mm was obtained. Based on the isothermal plastic deformation tests and EBSD analysis, the static recrystallization kinetics of the prepared coarse-grained B2 iron aluminide after strain 0.20 was mathematically described. Recrystallized fraction depends on deformation/annealing temperature (900–1100 °C) as well as on annealing time. The activation energy of static recrystallization was calculated as 255 kJ mol−1. Competition between dynamic recovery and static recrystallization was proved after strain 0.35 and annealing temperature 1100 °C. Static recrystallization starts relatively easily in the studied alloy, but a very long-term annealing is quite necessary for the complete course of recrystallization. The mean size of recrystallized grains falls with the decreasing annealing temperature (0.47 ± 0.15 mm for temperature 1100 °C, and 0.22 ± 0.04 mm for 900 °C). Even at a temperature of 1200 °C the annealing after deformation should last approx. 1 min for obtaining the fully recrystallized microstructure. That is why the standard hot forming technologies should be combined by an interpass annealing in order to refine sufficiently the coarse grains.en
dc.format.extent11cs
dc.identifier.doi10.1016/j.acme.2017.03.004
dc.identifier.issn1644-9665cs
dc.identifier.urihttps://dspace.tul.cz/handle/15240/30673
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S1644966517300341
dc.language.isoengcs
dc.publisherELSEVIER URBAN & PARTNER SP Z O Ocs
dc.publisher.cityWroclawcs
dc.relation.ispartofseries0cs
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S1644966517300341cs
dc.subjectIron aluminidecs
dc.subjectHot compression testcs
dc.subjectIsothermal annealingcs
dc.subjectEBSDcs
dc.subjectStatic recrystallizationcs
dc.titleKinetics of static recrystallization in the coarse-grained Fe–40 at.%Al–Zr–B alloycs
local.citation.epage816-826cs
local.citation.spage816-826cs
local.identifier.publikace4123
local.identifier.wok416528900009en
local.relation.issue4cs
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