Abstract: The present invention provides an oxide dispersion strengthened alloy in which even with aluminum contained, the particle diameter and dispersion spacing of the oxide are decreased, and the strength at high temperature, the high temperature oxidation and the corrosion resistance can be improved. An oxide dispersion strengthened alloy being a nickel-base alloy containing aluminum, hafnium, and yttrium oxide, wherein a complex oxide of the yttrium oxide and hafnium oxide is dispersed in a matrix of the nickel-base alloy, with the aluminum contained.

Abstract: The invention intends to provide a hydrogen storage alloy that can absorb and release hydrogen effectively at room temperature and shows excellent hydrogen storage amount and effective hydrogen transfer amount and furthermore shows excellent endurance. A pulverized hydrogen storage alloy powder is heated at 600° C. or more and 1200° C. or less for 10 min to 30 hr to apply strain relief annealing. A particle diameter of the hydrogen storage alloy powder is desirably 10 ?m or less and the hydrogen storage alloy is desirably mainly composed of a BCC phase. Since the initial strain ahead of the hydrogenation is removed, a solid solution region of hydrogen is largely reduced and an initial hydrogen storage amount and an effective hydrogen transfer amount are increased.