金属材料动态再结晶模型研究现状

动态再结晶是热塑性变形过程中重要的材料软化、晶粒细化、组织控制和塑性成形能力改善方法,而材料发生动态再结晶过程形成的组织结构直接决定其综合性能,因此,长期以来动态再结晶一直是热成形过程中的研究热点。概述了动态再结晶的物理机理,介绍了位错密度模型、动力学模型和微观组织演化数值模拟,并对目前研究现状进行分析,展望其未来发展前景。

Current Research Status of Dynamic Recrystallization Model of Metallic Material

Dynamic recrystallization is an effective approach to refine grains, control texture and improve plastic deformation capacity. The mechanical properties of metal materials are directly determined by the microstructure formed by dynamic recrystallization. Therefore, an increasing number of literature concerning dynamic recrystallization have been addressed throughout the world. In the present work, the physical basis for dynamic recrystallization is reviewed. The dislocation density model, kinetic model and flow behaviors, including typical material responses to plastic deformation and the influencial factors are systematically discussed in detail. Finally, the research status of dynamic recrystallization is deeply analyzed and the developing prospect is summarized.