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Abstract
A series of Ni-ThO2 and Ni-12% Mo-ThO2 alloys, containing from 3 to 9 vol.-% thoria, were prepared by selective hydrogen reduction of mixed submicron oxides. Room-temperature strength properties considerably higher than usual, with good ductility, were obtained. At 982°C, creep-rupture properties were excellent, with significant improvements in strength and stability due to solid-solution strengthening of nickel by 12 wt.-% molybdenum. An investigation was made of the benefits derived from additional cold work after hot extrusion, with and without intermediate annealing treatments. An analysis of the probable strain distribution in oxide-dispersion-strengthened alloys is presented.
Notes
* Manuscript received 28 August 1964. Contribution to a Symposium on “Recent Advances in Powder Metallurgy”, held in London on 22 and 23 October 1964.