Optimized Preparation Process of Powder Metallurgy Nickel-Base Superalloys by a New High-Throughput Method

Optimizing preparation process of powder metallurgy (P/M) nickel-base superalloys is critical to obtain a desired material. In this study, a new high-throughput consolidation of powder is introduced to optimize the preparation process, microstructure and properties of P/M nickel-base superalloys. The influences of consolidation temperature, strain rate and ball milling time on the hardness of nickel-base superalloys were studied. The relationship among process, microstructure and hardness was established, the nanoparticles strengthening and grain boundary strengthening in nickel-base ODS superalloys were discussed. The results indicate that increasing ball milling time, moderately low consolidation temperature and high strain rates are beneficial to the consolidation and hardness improvement of nickel-base superalloys. Dispersion strengthening of nanoparticles and grain boundary strengthening play important role in nickel-base ODS superalloys