The understanding of irradiation-induced strengthening in ferritic-martensitic high-Cr steels remains an essential issue in the assessment of materials for fusion and next generation fission reactors. Recent advanced experimental studies revealed the importance of solute-rich clusters, containing Cr, Ni, Si, P and Mn, which often are created as a consequence of segregation at dislocation lines. In this work, Metropolis Monte Carlo (MMC) is applied to investigate segregation of Cr and Ni atoms around edge dislocation lines in bcc Fe. The content of Cr is varied between 7% and 10%, with and without 0.25% of Ni. Molecular dynamics has subsequently been applied to the enriched dislocation lines to study the critical resolved shear stress at 300 K and 600 K for different concentrations of solutes in the alloy. It is found that even small amounts of Ni significantly increase the hardening of the material.

在评估聚变和下一代裂变反应堆的材料时，了解铁素体-马氏体高Cr钢中的辐照诱导强化仍然是必不可少的问题。最近的高级实验研究表明，富含Cr，Ni，Si，P和Mn的富含溶质的簇的重要性，这些簇通常是由于位错线处的偏析而产生的。在这项工作中，蒙特卡洛大都会（MMC）被用于研究bcc Fe中边缘位错线周围Cr和Ni原子的偏析。Cr的含量在7％和10％之间变化，有和没有0.25％的镍。随后将分子动力学应用于富集位错线，以研究合金中不同溶质浓度在300 K和600 K时的临界分辨剪切应力。