Abstract Microstructure of a Fe–25Mn–2Al–0.1C steel studied under uniaxial tension revealed a gradually decreasing three-stage strain hardening behavior. Early deformation microstructure comprised of dislocations configurations; like Taylor lattice and stair-rod dislocations. Deformation twinning nucleated in regions lacking homogenous dislocation substructure. Dislocations cells and fine twin bundles were observed near failure strain. The strain hardening was a concomitant effect of deformation twins and dislocation substructure, while the contribution of dislocations seems to overwhelm the contribution from twinning.

中文翻译：

---

拉伸变形 Fe-Mn-Al-C 钢中的位错子结构

摘要 Fe-25Mn-2Al-0.1C 钢在单轴拉伸下的显微组织显示出逐渐降低的三级应变硬化行为。由位错构型组成的早期变形微观结构；像泰勒格子和楼梯杆位错。变形孪晶在缺乏同质位错亚结构的区域成核。在失效应变附近观察到位错细胞和细小的孪晶束。应变硬化是变形孪晶和位错子结构的伴随效应，而位错的贡献似乎压倒了孪晶的贡献。