ارزیابی ریزجدایش در حین انجماد دندریتی آلیاژ دوتایی با کاربرد روش میدان فازی و شبیه های تحلیلی

نویسندگان

1 کارشناس ارشد دانشکده مهندسی مواد و متالورژی دانشگاه علم و صنعت تهران

2 استاد دانشکده مهندسی مواد و متالورژی دانشگاه علم و صنعت تهران

چکیده

در این پژوهش، ریزجدایش در انجماد جهت‌دار دندریتی با کاربرد شبیه‌سازی به وسیله ی روش میدان فازی و شبیه‌های تحلیلی موجود مورد بررسی قرار گرفت. مقایسه ی نتایج بدست آمده از شبیه‌سازی عددی و حل معادله‌های تحلیلی نشان داد که در شرایط مورد بررسی، روابط تحلیلی مقادیری بیش از آن چه از راه شبیه‌سازی بدست آمده را پیش بینی کرده اند. این امر هم برای شرایط وجود نفوذ در جامد هم عدم وجود آن صادق بوده است. هم چنین، در محدوده‌ای از کسر جامد، نتایج شبیه‌سازی و شبیه‌های تحلیلی تطابق مناسبی دارند که با زیاد شدن کسر جامد اختلاف بین آن ها افزایش می‌یابد
 

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of microsegregation during dendritic solidification of a binary alloy using phase field method and analytical models

چکیده [English]

In this research microsegregation in the dendritic directional solidification has been investigated using phase field simulation and some of analytical models. Comparison of the numerical and analytical results showed that in the investigation conditions, the analytical equations overestimated the phase field simulation results. It is found under both back diffusion and no back diffusion conditions. In a range of the solid fraction numerical and analytical results were comparable and difference between them was increased by increasing of the solid fraction. 

کلیدواژه‌ها [English]

  • microsegregation
  • dendritic solidification
  • phase field method
  • simulation
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