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- Farooq, Muhammad Umar, 1973, et al.
(författare)
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EBSD characterization of carbide-carbide boundaries in WC-Co
- 2004
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Ingår i: Journal of Microscopy. ; 213:March, s. 306-312
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Tidskriftsartikel (refereegranskat)abstract
- A sample of WC-6wt%Co was investigated for grain boundary character distribution and occurence of coincidence site lattice (CSL) boundaries on a statistical basis. For this purpose orientation measurements of the grains were carried out using electron back-scattered diffraction (EBSD). The dominant misorientation relationships were determined by complementary EBSD data representation tools such as orientatin maps, misorientation angle distribution histograms and the sectioned three-dimensional misorientation space. It was found that the grain boundary character distribution of the material is nearly random and the CSL boundaries are not present in statistically significant amounts. It was also found that the amount of binder phase does not play a role in the formation of special boundaries. The paper focuses on the methodology of characterizing grain boundaries in a hexagonal material using EBSD.
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| 2. |
- Farooq, Muhammad Umar, 1973, et al.
(författare)
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Microstructual investigation of Co-Cr clad applied on railway wheels
- 2004
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Ingår i: Proceedings of the Channel User Meeting 2004, Ribe, Denmark.. ; , s. 25-30
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Laser cladding is applied to locally improve the functional surface properties of parts such as wear resistance (increased surface hardness) and corrosion resistance. In the present study the EBSD technique was used to investigate microstructure and textur of a Co-Cr-clad applied on railway wheels. The investigations showed that the clad consists of elongated grains that grow perpendicular to the clad surface with a [001] fibre texture. The investigations also revealed that no dominant orientation relationship (angle/axis pair) occurs between the alpha-Co grains of the clad. The relative orientation between the alpha-Co (high temperature) and gamma-Co (low temperature) phase is determined by comparing the pole figures of the respective phases. Different reasons of aprupt changes in the colors of the orientation maps are also discussed.
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