A method for additively manufacturing a precipitation dispersion strengthened alloy component by laser or electron beam-based process comprising nano-sized precipitates of oxides, nitrides or both dispersed in a metal alloy based matrix, the method comprising: providing a core-shell structured alloy powder comprising a plurality of particles, wherein one or more of the plurality of particles comprise: an alloy powder core having an alloy constituent matrix with one or more reactive elements, wherein the one or more reactive elements are configured to react with oxygen, nitrogen, or both so as to form nano-sized precipitates of an oxide, a nitride, or both in the alloy constituent matrix; and an oxygen or nitrogen rich shell disposed on at least a portion of the alloy powder core, wherein the alloy constituent matrix comprises stainless steel, an iron based alloy, a nickel based alloy, a nickel-iron based alloy, a cobalt based alloy, a copper based alloy, an aluminum based alloy, a titanium based alloy, or combinations thereof, and wherein the alloy constituent matrix comprises the one or more reactive elements present in a range from about 0.01 weight percent to 10 weight percent of a total weight of the alloy powder producing the precipitation dispersion strengthened alloy component from the core-shell structured alloy powder using the laser or electron beam-based powder bed additive manufacturing; and processing the precipitation dispersion strengthened alloy component using one or more heat treatment steps. an alloy powder core having an alloy constituent matrix with one or more reactive elements, wherein the one or more reactive elements are configured to react with oxygen, nitrogen, or both so as to form nano-sized precipitates of an oxide, a nitride, or both in the alloy constituent matrix; and an oxygen or nitrogen rich shell disposed on at least a portion of the alloy powder core, wherein the alloy constituent matrix comprises stainless steel, an iron based alloy, a nickel based alloy, a nickel-iron based alloy, a cobalt based alloy, a copper based alloy, an aluminum based alloy, a titanium based alloy, or combinations thereof, and wherein the alloy constituent matrix comprises the one or more reactive elements present in a range from about 0.01 weight percent to 10 weight percent of a total weight of the alloy powder producing the precipitation dispersion strengthened alloy component from the core-shell structured alloy powder using the laser or electron beam-based powder bed additive manufacturing; and wherein the alloy constituent matrix comprises stainless steel, an iron based alloy, a nickel based alloy, a nickel-iron based alloy, a cobalt based alloy, a copper based alloy, an aluminum based alloy, a titanium based alloy, or combinations thereof, and wherein the alloy constituent matrix comprises the one or more reactive elements present in a range from about 0.01 weight percent to 10 weight percent of a total weight of the alloy powder producing the precipitation dispersion strengthened alloy component from the core-shell structured alloy powder using the laser or electron beam-based powder bed additive manufacturing; and processing the precipitation dispersion strengthened alloy component using one or more heat treatment steps.