کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620170 | 988593 | 2013 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modeling dendrite growth in undercooled concentrated multi-component alloys
ترجمه فارسی عنوان
مدل سازی رشد دندریت در آلیاژهای چند جزء متمرکز کم عمق
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کلمات کلیدی
چند جزء، غلظت رشد دندریت، انجماد سریع،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Most theoretical work on dendrite growth has focused on dilute binary alloys, while most industrial alloys are concentrated multi-component systems. By incorporating the local non-equilibrium effects both at the interface and in the bulk liquid, the thermodynamic database and diffusional interaction, a model was developed for dendrite growth in undercooled concentrated multi-component alloys. An experimental study of dendrite growth in undercooled Ni-18Â at.% Cu-18Â at.% Co melts was carried out and the measured interface velocities (V) were well predicted by the present model over the whole undercooling range (ÎTÂ =Â 30-313Â K). During dendrite growth the partition coefficients change non-monotonically due to interaction between the species and changes in the dendrite tip radius. Interaction between the species also leads to a lower interface velocity and larger ÎT and V as the ÎT-V relation plateaus. The previous definition of constitutional undercooling, i.e. the sum of the contributions of each solute, is not applicable to concentrated multi-component alloys. The controlling mechanisms during dendrite growth are discussed with respect to the results of the calculations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 61, Issue 11, June 2013, Pages 4254-4265
Journal: Acta Materialia - Volume 61, Issue 11, June 2013, Pages 4254-4265
نویسندگان
Kang Wang, Haifeng Wang, Feng Liu, Haimin Zhai,