The hot corrosion behavior of nickel-based single-crystal superalloy after drilling is investigated at 900 °C. The characteristics of hot corrosion after drilling which are different from normal hot corrosion are reflected in the formation of a more stable oxide layer and less severe spallation. The change of microstructure around the hole is the main reason for the formation of a stable oxide layer during hot corrosion by changing the diffusion process of alloying elements. Subsequently, the formation of a stable oxide layer can reduce the effect of spalling by optimizing surface stress.

中文翻译：

---

钻后镍基单晶高温合金在900°C时异常热腐蚀行为的研究

研究了镍基单晶高温合金在900°C下的热腐蚀行为。与正常的热腐蚀不同的是，钻孔后的热腐蚀特征表现为形成了更稳定的氧化物层和更少的严重剥落。通过改变合金元素的扩散过程，孔周围微观结构的变化是在热腐蚀过程中形成稳定氧化物层的主要原因。随后，形成稳定的氧化物层可以通过优化表面应力来减少剥落的影响。