Hilger, I.I.HilgerBergner, F.F.BergnerWeißgärber, T.T.Weißgärber2022-03-052022-03-052015https://publica.fraunhofer.de/handle/publica/24171710.1111/jace.13833Oxide dispersion strengthened Fe-Cr alloys produced by mechanical alloying and spark plasma sintering were found to form different heterogeneous hardness distribution and microstructures depending on the milling parameters. Microstructure investigations by means of electron-diffraction techniques and atom probe tomography revealed the presence of large particle-free zones in one material, which is, together with the inhomogeneous deformation at short milling times, considered the main reason for the formation of a heterogeneous microstructure. The inhomogeneous temperature distribution in the sample volume during the sintering process is also expected to contribute to the formation of a heterogeneous grain size distribution in the final material.en666journal article