超高应变塑性变形钢丝的力学性能特性

Characteristics of the Mechanical Properties of Steel Wire Under High Strain Deformation

根据损伤力学的基本原理 ,利用测量弹性模量和观察金相的方法 ,研究了在拉拔应力状态下 ,随变形量的不断增大 ,材料的损伤特性。结果表明 ,当应变量达到一定程度时 ,在夹杂物周围、珠光体和铁素体边界上首先形成空洞 ,即产生损伤。随着应变量的不断增大 ,空洞数量逐渐增加 ,材料损伤程度加剧 ,并得出了材料损伤程度随应变量增大的变化规律。

Based on the damage mechanics and metallography analysis, the characteristics of plastics damage of steel wire under high strain deformation were researched. The results show that cavities form around the inclusion or in the interface between pearlite and ferrite in the first, and the number of cavities increases with the increase of true strain during plastic deformation. The corresponding relationship between deformation strain, cavity and plastics damage was obtained.