کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448789 988683 2009 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of the maximum transformation rate for analyzing solid-state phase transformation kinetics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Evaluation of the maximum transformation rate for analyzing solid-state phase transformation kinetics
چکیده انگلیسی

An evaluation of the maximum in the transformation rate of a solid-state transformation is given for isothermal and isochronal transformations, on the basis of a general, flexible, analytical transformation model incorporating different combinations of nucleation, growth and impingement modes. For isothermal phase transformations, the position of the peak maximum is determined by the growth exponent and the impingement mode whereas, for isochronal phase transformations, only the impingement mode influences the position of the peak maximum. A straightforward method has been developed for determining the mode of impingement and the separate activation energies for nucleation and growth. The results obtained by application of the proposed transformation-rate maximum analysis to model systems are in good agreement with the values assigned to the kinetic parameters of the model systems. The proposed recipes have also been applied successfully to experimental data on the crystallization of an initially amorphous Mg–Cu–Y alloy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 20, December 2009, Pages 6176–6190
نویسندگان
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