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Microstructural characterization of a Co-Cr-Mo laser clad applied on railway wheels

Muhammad Umar Farooq (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Uta Klement (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Gert Nolze
International Journal of Materials Research Vol. 97 (2006), 6, p. 838-844.
[Artikel, refereegranskad vetenskaplig]

A Co–Cr–Mo laser clad applied on railway wheels is characterised by a combination of EBSD and EDX. A complete pass of the clad is investigated to achieve a better understanding of the microstructure evolution during laser cladding. A microstructure with columnar grains extending over the whole thickness of the clad is observed. The grains have a <001>-fibre texture with the fibre axis parallel to the normal of the substrate surface, and a substructure consisting of cells/dendrites. During the cladding process, two different kinds of precipitates form in the cell walls, which can be identified as M6C and a non-equilibrium phase. Furthermore, stacking faults are observed to occur in the clad grains and are discussed with respect to the laser cladding process.

Nyckelord: Laser clad; Co-Cr-Mo; EBSD; carbides



Denna post skapades 2006-09-12. Senast ändrad 2014-09-02.
CPL Pubid: 21775

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Ämnesområden

Fysik

Chalmers infrastruktur