| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1581319 | Materials Science and Engineering: A | 2009 | 4 Pages |
Abstract
A theoretical model based on Johnson-Mehl-Avrami (JMA) formalism for determining kinetics and activation energy of a precipitation process is derived from the variation in hardness properties. Effectiveness of the model for determining the kinetics of β-NiAl precipitation in PH13-8Mo steel and for distinguishing the kinetics between two temperatures is also demonstrated. The activation energy for β-precipitation, 244.3 kJ/mol, determined over 808 K to 868 K is in good agreement with that of diffusion of Ni and Al in α-iron.
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Physical Sciences and Engineering
Materials Science
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Authors
Joy Mittra, U.D. Kulkarni, G.K. Dey,