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Licensed Unlicensed Requires Authentication Published by De Gruyter May 18, 2013

Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel

Dedicated to Prof. Dr.-Ing. Heinrich Wollenberger on the occasion of his 80th birthday

R. Prakash Kolli and David N. Seidman


The coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel, containing 1.12 at.% Cu, aged at 550 °C or at 550 °C plus 2 h at 200 °C is investigated. The temporal evolution of the precipitates, heterophase interfaces, and a-Fe matrix compositions and precipitate morphology are presented. Coarsening time exponents are determined for the mean radius, <R(t)>, and number density, Nv(t), and compared to the Lifshitz – Slyzov – Wagner model for coarsening, modified for concentrated multicomponent alloys by Umantsev – Olson. The experimental results indicate that <R(t)> and Nv(t) are in reasonable agreement with Umantsev – Olson model behavior. Additionally, we compare the results to earlier investigations of similar concentrated multicomponent steels containing 1.82 at.% Cu and 1.17 at.% Cu, aged at 500 °C.

Correspondence address, Dr. R. Prakash Kolli, E-mail:
Correspondence address, Prof. Dr. David N. Seidman, Northwestern University, Department of Materials Science and Engeineering, 2220 Campus Drive, Evanston, IL 60208-3108, USA, Tel.: +1847491 4391, Fax: +1847491 7820, E-mail:


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Received: 2011-1-25
Accepted: 2011-7-29
Published Online: 2013-05-18
Published in Print: 2011-09-01

© 2011, Carl Hanser Verlag, München

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