Effect Of Composition And Dispersoids On High-Temperature Strength Of Ni-ODS Superalloy

Nickel-based oxide dispersion strengthened (Ni-ODS) alloys are promising materials for high-temperature applications due to their excellent mechanical properties.This study investigates the effects of composition and dispersoid additions on the high-temperature strength of Ni-ODS alloys. Alloys were made by mechanical alloying and vacuum induction hot pressing. FE-SEM and EDS analysis were performed for microstructure analysis, and Gleeble test was performed to evaluate the high temperature mechanical properties. The results showed that the Nb-Si and Y2O3 composite dispersion strengthened alloy exhibited excellent high-temperature mechanical properties by effectively suppressing grain growth and dislocation motion in the alloy. Based on these findings, Ni-ODS alloys have significant potential for application in aerospace and power generation industries, where high-temperature strength and stability are critical.