Ofori-Opoku Nana, Hoyt Jeffrey J, Provatas Nikolas
Department of Materials Science and Engineering and Brockhouse Institute for Materials Research, McMaster University, 1280 Main Street West, Hamilton, Canada L8S 4L7.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Dec;86(6 Pt 2):066706. doi: 10.1103/PhysRevE.86.066706. Epub 2012 Dec 21.
We present a phase-field-crystal model for driven systems which describes competing effects between thermally activated diffusional processes and those driven by externally imposed ballistic events. The model demonstrates how the mesoscopic Enrique and Bellon [Phys. Rev. Lett. 84, 2885 (2000)] model of externally induced ballistic mixing can be incorporated into the atomistic phase-field-crystal formalism. The combination of the two approaches results in a model capable of describing the microstructural and compositional evolution of a driven system while incorporating elastoplastic effects. The model is applied to the study of grain growth in nanocrystalline materials subjected to an external driving.
我们提出了一种用于驱动系统的相场晶体模型，该模型描述了热激活扩散过程与外部施加的弹道事件驱动的过程之间的竞争效应。该模型展示了如何将外部诱导弹道混合的介观恩里克和贝隆[《物理评论快报》84, 2885 (2000)]模型纳入原子相场晶体形式体系。这两种方法的结合产生了一个能够描述驱动系统微观结构和成分演变同时纳入弹塑性效应的模型。该模型应用于研究受外部驱动的纳米晶体材料中的晶粒生长。
