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On the phase field model for microstructure evolution during selective laser melting of powder bed including diffusion-induced stressesстатья
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 4 мая 2020 г.
- Автор: Mirzade F.Kh
- Журнал: Journal of Physics: C
- Том: 1368
- Год издания: 2019
- Первая страница: 022043
- DOI: 10.1088/1742-6596/1368/2/022043
- Аннотация: In this paper, we develop a phase field model for microstructure evolution in laser powder-bed additive manufacturing processes, which allows for the effect of elastic stresses due to diffusion of atomic defects (vacancy and interstitial atom) generated at the moving liquid-solid interface. The governing equations of the model including a timedependent Ginsburg-Landau equation for the phase field with additional stress term, a diffusion-drift Cahn–Hilliard like equation describing atomic defect dynamics, an energy balance equation for the temperature change, and finally the mechanical equilibrium equation for the elastic displacement fields are derived within a thermodynamic framework based on entropy generation guaranteeing thermodynamic consistency. The most simple 1D and isothermal equilibrium situation is considered to study phenomenon of diffusionflexural instability with the atomic defect clustering and periodic distributions of defects. The effect of this instability on the exfoliation of deposited thin layers on a substrate is also discussed.
- Добавил в систему: Мирзаде Фикрет Хансуварович