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Kolli, R.Prakash; Seidman, David N. |
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Publication |
Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel |
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Journal Article |
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2011 |
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Abstract |
International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) |
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102 |
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09 |
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1115-1124 |
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Coarsening, Phase separation, Fe-Cu alloys, Atom-probe tomography, Precipitation |
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Abbreviated Series Title |
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 α-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. |
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1862-5282 |
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NU @ karnesky @ 2186 |
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11293 |
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