کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450789 988745 2007 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Additivity rule, isothermal and non-isothermal transformations on the basis of an analytical transformation model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Additivity rule, isothermal and non-isothermal transformations on the basis of an analytical transformation model
چکیده انگلیسی

In the present work, the “additivity rule” was proved to be compatible with an analytical transformation model assuming mixed nucleation (with site saturation and continuous nucleation as two extremes), for some specified conditions. Combining the analytical model with numerical calculations, it is practicable to allow a conversion of continuous heating or cooling transformation (CHT or CCT) data into isothermal transformation data (TTT), and also a conversion of TTT data into CHT or CCT data, under a restrictive assumption of constant cooling or heating rate. From a comparative study between TTT and CHT data, the effective activation energy was found to increase and decrease, respectively, as compared with that before the CHT–TTT and TTT–CHT conversions; the growth exponent was proved to hold almost invariably, independent of the conversions. Real applications in the crystallization of amorphous Mg–Ni alloy and in the gamma–alpha massive transformation in Fe–Mn alloy show that the above conclusions are reasonable.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 15, September 2007, Pages 5255–5267
نویسندگان
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