校长信箱
dean at scse.hebut.edu.cn
先进金属材料变形机理的原子到宏观跨尺度模拟研究

     2019年6月28日,河北工业大学材料学院邀请了美国Missouri University of Science and Technology大学的周才智副教授在河北工业大学红桥校区东院能源装备材料技术研究院201报告厅做了题为《先进金属材料变形机理的原子到宏观跨尺度模拟研究》的学术交流报告,材料学院师生参加了报告会。

     该报告主要讲述如何将不同尺度上多种模拟工具有效结合,构建一个多尺度框架来研究先进金属结构材料的力学性能,并为设计及加工更优性能的先进材料提供了科学依据。报告中周才智副教授以异质界面以及晶界结构对力学性能的影响为案例,系统的阐述了多尺度计算对材料科学的重要性。在随后的讨论环节, 周才智副教授与现场的听众进行了热烈互动,报告会取得了良好的学术交流效果。

     Abstract:Advanced metallic structural materials, such as metallic nanolayered composites, heterogeneous and gradient materials, have drawn increased attention in the past decade because of their ultrahigh strength, increased ductility and elevated fracture toughness. Fundamental barriers must be resolved to manufacture such advanced metallic materials in bulk form and at reduced cost. Significant research has been conducted in recent years to understand the underlying mechanisms that control the mechanical behavior of these advanced materials. Both experiments and modeling have revealed that as microstructure length-scales are reduced, interfaces, such as grain boundaries and phase boundaries, become crucial in determining the mechanical behavior of those materials. Through the development of computer resources and novel experimental methods, macroscopic and phenomenological descriptions of mechanical behaviors are being substituted by multi-scale approaches rooted in deeper understanding of microstructure- and defect-level processes during the deformation. Challenges remain in developing models with truly predictive capability in applications to nanostructured materials. This talk will review various modeling tools at different length scales and present a new hierarchical multi-scale modeling framework to study mechanical behavior of advanced metallic structural materials and provide a scientific basis for design and processing advanced materials with superior properties.


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