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Chemically graded Fe-Al/steel samples fabricated by laser metal deposition

: Lotfian, S.; Rolink, G.; Weisheit, A.; Palm, M.


MRS advances 2 (2017), No.26, pp.1393-1398
ISSN: 2059-8521
Journal Article
Fraunhofer ILT ()

By laser metal deposition (LMD) samples from Fe–28Al (at.%) have been built on iron and various steels. Chemically graded iron aluminium and Fe–28Al/steel samples were fabricated with intended concentration gradients by controlling the feed rates of the powders. All samples were subsequently heat treated at 700 °C for 1000 h to study possible reactions between Fe–28Al and the steels and the long-term stability of the composition gradients. Microstructures were characterized by scanning electron microscopy (SEM) and concentration profiles along the building direction were analysed by energy- and wavelength-dispersive spectrometry (EDS, WDS).