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EBSD an EDX analysis at the cladding-substrate interface of a laser clad railway wheel

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), 11, p. 1512-1518.
[Artikel, refereegranskad vetenskaplig]

Electron backscatter diffraction technique and energy-dispersive X-ray spectrometry were used to investigate the intermixed interface produced during laser cladding of Co–Cr–Mo alloy on a steel substrate. A multi-component system and rapid solidification conditions together lead to a complex microstructure at the interface. The solidification of the cladding starts with the formation of an interface layer, which is about 75 m in thickness and consists of randomly oriented equiaxed grains of Co–Cr–Fe solid solution and martensite. Orientation analysis of the grains in the interface layer revealed that some grains have a special orientation relationship with the former austenite grains in the heat affected zone but the cladding is not formed by epitaxial growth on the substrate. Intermixing of the materials at the interface is providing a strong bond between the substrate and the cladding. For a grain from interface layer to emerge as columnar grain in the cladding, it was determined that its <001> crystallographic direction is not supposed to deviate more than 25 from the sample normal direction.

Nyckelord: EBSD, Laser cladding, Interface, Orientation, Nishiyama-Wassermann relationship



Denna post skapades 2006-11-27. Senast ändrad 2014-09-02.
CPL Pubid: 23478

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik (2005-2017)

Ämnesområden

Funktionella material

Chalmers infrastruktur