Influence of Thermomechanical Processing on Microstructural Evolution in Near-alpha Alloy IMI834

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DOIResolve DOI: http://doi.org/10.1016/j.msea.2005.10.042
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TypeArticle
Journal titleMaterials Science and Engineering
Volume416
Issue1-2
Pages300311; # of pages: 12
SubjectTitanium Alloys; Dynamic Recrystallization; Isothermal Deformation; Shear Banding; Flow Softening
AbstractThe effect of processing parameters on the evolution of the microstructural characteristics of IMI834 were examined over the temperature range 950–1125 °C at constant strain rates of 0.001–1 s−1 and true strains up to 1.2. During isothermal deformation, differences in the flow softening behavior were observed for processing in the single-phase beta region, as compared to the two-phase alpha–beta region, which has been related to differences in the structural changes occurring in IMI834. In particular, deformation processing of the alpha–beta structure was observed to work the lamellar alpha structure of the transformed beta grains without recrystallization of either phase, whilst microstructural development in a predominately beta structure resulted in the formation of dynamically recrystallized grains that were necklaced around the deformed and elongated beta phase. For the later case, the variation in the dynamically recrystallized grain size was determined to follow a Zener–Hollomon relationship between a strain rate range 0.001 and 1 s−1.
Publication date
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
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unlimited
Peer reviewedNo
NRC numberAMTC-2004-0088
NPARC number8930580
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Record identifier510a5768-26f4-4e7c-9322-48f0e2fdfffb
Record created2009-04-23
Record modified2016-05-09
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