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Dispersoid reinforced alloy powder and method of making

United States Patent

December 10, 2013
View the Complete Patent at the US Patent & Trademark Office
Alloy Design and Method for Processing Low-Cost Refractory Dispersoid-Reinforced Alloys for Harsh Environments
Low-Cost Production Method for Alloys Used in Harsh Environments
A method of making dispersion-strengthened alloy particles involves melting an alloy having a corrosion and/or oxidation resistance-imparting alloying element, a dispersoid-forming element, and a matrix metal wherein the dispersoid-forming element exhibits a greater tendency to react with an introduced reactive species than does the alloying element and wherein one or more atomizing parameters is/are modified to controllably reduce the amount of the reactive species, such as oxygen, introduced into the atomized particles so as to reduce anneal times and improve reaction (conversion) to the desired strengthening dispersoids in the matrix. The atomized alloy particles are solidified as solidified alloy particles or as a solidified deposit of alloy particles. Bodies made from the dispersion strengthened alloy particles, deposit thereof, exhibit enhanced fatigue and creep resistance and reduced wear as well as enhanced corrosion and/or oxidation resistance at high temperatures by virtue of the presence of the corrosion and/or oxidation resistance imparting alloying element in solid solution in the particle alloy matrix.
Anderson; Iver E. (Ames, IA), Rieken; Joel (Ankeny, IA)
Iowa State University Research Foundation, Inc. (Ames, IA)
12/ 072,298
February 25, 2008
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. DE-AC02-07CH11358 between the U.S. Department of Energy and Iowa State University.