首页|Low cycle fatigue of a γ'-strengthened Co-based single crystal superalloy at 900 °C
Low cycle fatigue of a γ'-strengthened Co-based single crystal superalloy at 900 °C
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
? 2022The strain-control low cycle fatigue behaviour of a γ'-strengthened Co-based single-crystal superalloy was investigated at 900 °C. The fatigue life of the alloy was longer than conventional Co-based superalloys due to strengthening provided by the γ'. Additionally, it is found that slip bands consisting of many tangled dislocations and stacking faults continuously cut through the γ' phase with the strain amplitude above elastic limit, which is the main deformation mechanism. The planar slip deformation mode has resulted in crystallographic fracture. In contrast, few dislocations were observed in the sample cycled below elastic limit and severe oxidation at surface introduced Co3W/γ layer and recrystallization leading to mode I crack.
NSTL
Elsevier
