Abstract Current paper presents a study of the α–α’ phase separation during prolonged heat treatments at 400 and 450°C of 14%Cr oxide dispersion strengthened steel. Vickers hardness, thermo-electric power and differential scanning calorimetry measurements enabled to conclude that α’ precipitates already after 5,000 hr at 400°C, while at 450°C precipitation is detected only after 10,000 hr. Yet, the amount of α’ after 10,000 hr at 450°C was larger. The results, combined with thermodynamic and diffusion length calculations, affirm that in 14%Cr ODS steel the separation occurs by the nucleation and growth mechanism rather than spinodal decomposition.

中文翻译：

---

中温下 14%Cr 氧化物弥散钢中 α-α' 相分离的动力学

摘要 当前论文研究了 14%Cr 氧化物弥散强化钢在 400 和 450°C 下长时间热处理过程中的 α-α' 相分离。维氏硬度、热电功率和差示扫描量热法测量能够得出结论，α' 在 400°C 下 5,000 小时后已经沉淀，而在 450°C 下仅在 10,000 小时后检测到沉淀。然而，在 450°C 下 10,000 小时后 α' 的量更大。结果，结合热力学和扩散长度计算，确认在 14% Cr ODS 钢中，分离是通过成核和生长机制而不是旋节线分解发生的。