Radiation induced amorphization of carbides in additively manufactured and conventional ferritic-martensitic steels: In-situ experiments on extraction replicas

•In-situ irradiations performed on nanoprecipitates in Eurofer97 and AM-Grade91.•The M23C6 carbides are highly susceptible to radiation induced amorphization.•MX type nanoprecipitates are highly amorphization resistant.•Crystalline-to-amorphous transformation temperature of M23C6 is ∼812 K.•Cation chemistry of M23C6 seems to have little effect on the amorphization behavior.