Review on the EFDA work programme on nano-structured ODS RAF steels (original) (raw)

Oxide dispersion strengthened (ODS) alloys have been under intensive development over the past four decades due to their excellent high-temperature creep strength and good oxidation resistance. Nickel-based ODS alloys are the combination of gamma prime (γ') strengthened superalloy with yttrium oxide evenly distributed throughout the matrix to allow the strength to be maintained to much higher temperatures than conventional superalloys. ODS alloys are being considered for high temperature applications in advanced power plant such as heat exchanger tube, boiler, superheating tube, vane or turbine blade. However, a key factor that limits their wide usage is the high manufacturing cost. In this research, a powder mixing technique, Hosokawa mechano chemical bonding (MCB) technology, is used to produce ODS powder mixtures with the aims of obtaining comparable or enhanced ODS powders with much less manufacturing cost. One of the key ideas of the proposed Hosokawa method is the use of n...