中文摘要：

探索电子消息传输方式结构的材料的变丑行为和预先退火的相关效果的温度依赖，相等隧道的尖紧迫 ECAP 生产的商业地纯的铁 CP Fe 作为试验性的材料被选择。变丑温度 T 的影响并且在变丑行为，表面变丑特征和 ECAP Fe 的基础上预先退火系统地被学习。结果证明 ECAP Fe 经历在在单轴的压缩，和弄软的度和收益力量期间变硬的快速的紧张以后弄软舞台的显著紧张 < 潜水艇 class= “ a-plus-plus ” > YS 首先与提起温度减少然后增加。在 400 点预先退火吗？

英文摘要：

To explore the temperature dependence of deformation behavior of BCC structural materials and the relevant effect of pre-annealing, commercially pure iron （CP Fe） produced by equal-channel angular pressing （ECAP） is selected as the experimental material. The influences of deformation temperature T and pre-annealing on deformation behavior, surface deformation characteristics and substructures of ECAP Fe were systematically studied. The results show that ECAP Fe undergoes a remarkable strain softening stage after a rapid strain hardening during uniaxial compression, and the softening degree and the yield strength avs first decrease and then increase with raising temperature. Pre-annealing at 400 ℃ effectively weakens the strain softening degree and increases trys. To understand the influence of deformation temperature on deformation behavior, as well as the relevant pre-annealing effect, deformation and damage characteristics and dislocation structures are studied in detail. In a word, the strain softening of ECAP Fe is associated not only with internal structural instability, but also with temperature, and pre-annealing at 400 ℃ improves high-temperature me- chanical properties of ECAP Fe.