Mittra, Joy ; Kulkarni, U. D. ; Dey, G. K. (2009) Hardness based model for determining the kinetics of precipitation Materials Science and Engineering A, 500 (1-2). pp. 244-247. ISSN 0921-5093
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.msea.2008.09.056
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Precipitation; Hardness; Kinetics; Martensitic Steel |
| ID Code: | 82285 |
| Deposited On: | 10 Feb 2012 04:52 |
| Last Modified: | 10 Feb 2012 04:52 |
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