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材料液态成形工艺中的凝固现象是发生在从铸锭 /铸件到原子集团尺寸范围内的多尺度液 固相变过程 ,同时还涉及或受控于多种物理场变化。正是这些多尺度的液 固相变特征与多重场量变化的复杂耦合作用共同决定了材料的凝固行为、结晶组织与缺陷形成以及成形零件 /材料的使用性能。近 2 0年来计算机软硬件技术的飞速发展 ,为多种基础学科交叉的材料凝固理论向着定量化的科学体系发展创造了有利条件 ,这是材料凝固理论今后发展与完善的重要方向之一。本文对基于多尺度、多场量耦合材料凝固成形计算机模型化的必要性及研究进展进行了简要概述 ,介绍了本文作者近 10余年来在该领域所进行的相关研究工作 ,最后就与材料凝固及液态成形计算机模型化相关的几个应重点加强研究的领域提出了几点建议
Solidification in the material liquid forming process is a multi-scale liquid-solid phase transition that takes place from the ingot / casting to the size of the atomic group, while also involving or being controlled by a variety of physical field variations. It is these multi-scale liquid-solid phase change characteristics and the complex coupling of multiple field changes that together determine the material’s set behavior, the formation of crystalline structures and defects, and the performance of the formed parts / materials. The rapid development of computer hardware and software technology in the recent 20 years has created favorable conditions for the development of a quantitative scientific system for the material solidification theory that intersects with a variety of basic disciplines. This is one of the important directions for the future development and improvement of the theory of material solidification. In this paper, the necessity and research progress of the computer modeling of solidification forming based on multi-scale and multi-field coupling materials are briefly introduced. The relevant research work carried out by this author in this field over the past 10 years is introduced. Finally, And liquid forming computer modeling related to several areas that should be focused on strengthening the research made a few suggestions