کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1445931 1509611 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A continuum approach for modeling gravitational effects on grain settling and shape distortion during liquid phase sintering of tungsten heavy alloys
ترجمه فارسی عنوان
یک رویکرد پیوسته برای مدل سازی اثرات گرانشی بر روی رسوب دانه و اعوجاج شکل در طی اسپکتروفتومینگ آلیاژهای سنگین تنگستن
کلمات کلیدی
فاز مایع، پختن جداسازی دانه، استقرار، اعوجاج
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

This paper presents a numerical approach for modeling gravity-induced grain settling and shape distortion during liquid phase sintering of tungsten heavy alloys. Using the framework of the continuum theory of sintering, this formulation provides insight into the development of microstructure heterogeneities during sintering by including grain settling. The model contains information about the properties of the solid and liquid constituents to describe both low-temperature and high-temperature sintering. The kinetic equations for porosity and solid volume fraction are based on mass conservation. To demonstrate the capabilities of the constitutive formulation, finite element analysis is used to simulate densification, shape distortion and solid–liquid separation. The results are compared to data of liquid-phase sintering of cylindrical W–Ni–Fe samples. The developed model attempts to analyze the solid-skeletal dissolution and microstructure gradients that impact the system rigidity during liquid phase sintering.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 65, 15 February 2014, Pages 176–184
نویسندگان
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