An observation of the binder microstructure in WC-(Co+Ru) cemented carbides using transmission Kikuchi diffraction
Autor: | Christoph Czettl, Mehdi Eizadjou, Simon P. Ringer, Hansheng Chen, Sophie Primig, Julia Pachlhofer |
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Rok vydání: | 2020 |
Předmět: |
010302 applied physics
Diffraction Materials science Misorientation Mechanical Engineering Metals and Alloys Nucleation 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Carbide Crystallography Mechanics of Materials Diffusionless transformation 0103 physical sciences General Materials Science 0210 nano-technology |
Zdroj: | Scripta Materialia. 183:55-60 |
ISSN: | 1359-6462 |
Popis: | The microstructure of WC-(Co+Ru) cemented carbides was studied using transmission Kikuchi diffraction (TKD). We report that the CoFCC grains contain Σ3-annealing twins which undergo an incomplete martensitic transformation to form CoHCP laths on cooling below TMs. The parent CoFCC and product CoHCP phases are related via the Shoji-Nishiyama orientation relationship. Four variants of the CoHCP plates exhibit a special misorientation of 70.5 ± 0.2° 〈 11 2 ¯ 0 〉 . A higher transformed fraction was observed in the sample possessing the lower binder content and finer WC grains. We suggest that this is due to the availability of more WC-binder interfaces, which facilitate CoHCP plate nucleation. |
Databáze: | OpenAIRE |
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