کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1561104 | 1513934 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modeling dislocation cutting the precipitate in nickel-based single crystal superalloy via the discrete dislocation dynamics with SISF dissociation scheme
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to fully capture dislocation cutting the precipitate (γⲠphase) in the nickel-based single crystal superalloy servicing in a wide range of temperatures, the superlattice intrinsic stacking fault (SISF) dissociation scheme is introduced into the three-dimensional discrete dislocation dynamics (3D-DDD) simulation framework by employing a total energy-based criterion for the transition from anti-phase boundary (APB) dissociation scheme to SISF one. The computational results show that the present 3D-DDD extension can successfully capture two key stages of the transition from APB to SISF dissociation. This extended 3D-DDD framework is also used to predict the overall stress-strain response of nickel-based single crystal superalloys at two typical temperatures 293 K and 873 K. Compared with the stress-strain curves predicted by the 3D-DDD framework only with consideration of APB dissociation scheme, the results by this extended 3D-DDD framework with consideration of both SISF and APB dissociations are closer to experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 75, July 2013, Pages 52-59
Journal: Computational Materials Science - Volume 75, July 2013, Pages 52-59
نویسندگان
Hui Yang, Zhenhuan Li, Minsheng Huang,