Influence of Initiation Site and Lamellar Divergency on the Overall Kinetics of Cellular Growth and Coarsening in Aged U-Nb Alloys

Influence of Initiation Site and Lamellar Divergency on the Overall Kinetics of Cellular Growth and Coarsening in Aged U-Nb Alloys

Overall kinetics of lamellar overaging reactions in U-5.5Nb and U-7.5Nb were analyzed by Avrami-Arrhenius analyses of volume fractions measured from an extensive temperature-time (T-t) matrix of specimens. The cellular initiation site (grain boundaries, inclusions) and regimes of lamellar divergency...

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Veröffentlicht in:Materials science forum 2018-12, Vol.941, p.863-868
Hauptverfasser: Kelly, Ann M., Papin, Pallas A., Clarke, Kester D., Emigh, Megan G., Tucker, Tim J., Hackenberg, Robert E., Forsyth, Robert T.
Format: Artikel
Sprache:eng
Schlagworte:
Coarsening
Grain boundaries
Growth rate
Inclusions
Lamellar structure
Nucleation
Overaging
Reaction kinetics
Uranium base alloys
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Zusammenfassung:Overall kinetics of lamellar overaging reactions in U-5.5Nb and U-7.5Nb were analyzed by Avrami-Arrhenius analyses of volume fractions measured from an extensive temperature-time (T-t) matrix of specimens. The cellular initiation site (grain boundaries, inclusions) and regimes of lamellar divergency-cum-slowing growth rate were explicitly accounted for. Avrami exponents n from T-t regimes of constant-growth rate were consistent with theory (1
ISSN:0255-5476
1662-9752
1662-9752
DOI:10.4028/www.scientific.net/MSF.941.863