复相材料的循环变形行为

Circular deformation behavior of multiple-phase materials

对三种组织状态的F -M复相钢进行了对称和非对称循环加载条件下的形变研究。结果表明 ,双相钢的循环变形行为 ,不仅与组织中位错组态的演变过程有关 ,同时也受循环载荷大小、类型以及加载方式所影响。分析表明 ,双相钢的循环硬化、软化行为主要受控于两个基本过程 ,即循环变形时位错组态演变的物理过程和相间分载应力的转嫁。

The deformation behavior of a F-M multiple-phase steel with three kinds of microstructures were studied under symmetrical or dissymmetrical circular loading conditions. The result shows that, the circular deformation behavior of two-phase steel not only relates to the evolutional process of the dislocation configuration of the microstructure, but also is affected by the intensity, type and loading modes of the circular load. The analysis shows that, the circular hardening and softening behavior of two-phase steels are mainly controlled by two basic processes, namely the physical process of dislocation configuration evolution during circular deformation, and the dynamic process of the loaded stress moving and residual stress changing between the phases.