کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620809 | 988702 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new phase-field method for simulating γⲠprecipitation in multicomponent nickel-base superalloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The phase-field method is used to develop a new technique to simulate γⲠprecipitation in multicomponent Ni-base superalloys. This technique generates the Gibbs free energy for both the γ and γⲠphases from the single function formalism of both phases in the CALPHAD method without using conventional CALPHAD software. The Gibbs free energy surfaces for eight-element multicomponent systems are used to confirm that there is an accurate coupling with the CALPHAD method, because they compare favorably with calculated results from Thermo-Calc. In addition, γⲠprecipitation in a third-generation Ni-base superalloy containing eight components is simulated in one dimension with anti-phase effects of the γⲠphase on the precipitate interactions. The simulation results reveal late-stage enrichments of Re and W in the γ phase during coalescence of the γⲠprecipitates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 6, April 2009, Pages 2020-2028
Journal: Acta Materialia - Volume 57, Issue 6, April 2009, Pages 2020-2028
نویسندگان
T. Kitashima, H. Harada,