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Mechanisms of plast...
Mechanisms of plastic deformation of WC-Co and Ti(C,N)-WC-Co
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- Östberg, Gustaf, 1971 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Buss, Katharina (author)
- Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
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- Christensen, Mikael, 1973 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Norgren, Susanne (author)
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- Andrén, Hans-Olof, 1947 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Mari, Daniele (author)
- Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
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- Wahnström, Göran, 1955 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Reineck, Ingrid (author)
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(creator_code:org_t)
- Elsevier BV, 2006
- 2006
- English.
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In: Int. J. Refract. Hard Mater.. - : Elsevier BV. - 0263-4368. ; 24:1-2, s. 135-144
- Related links:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The deformation of the cutting edge of inserts made from WC–Co and Ti(C, N)–19%WC–Co upon radial turning was measured as a function of the cutting speed. Ab initio calculations of some grain boundary geometries in WC–Co indicated that Co segregates to WC/WC grain boundaries in submonolayer proportions and increases their strength and resistance to Co infiltration. This was also confirmed with TEM-EDX. SEM studies showed that during plastic deformation the hard phase skeletons in both materials were partly broken up and infiltrated by binder phase. TEM observations showed a considerable deformation of the WC grains and some infiltrated grain boundaries were facetted along low energy planes. In the cermet, no deformation of the hard phase grains could be seen. The plastic deformation at high temperatures observed by three-point bending corresponds to a number of relaxation processes, detected by internal friction, related to grain boundary sliding. Both materials deform by grain boundary sliding, accommodated in the cermet by Co diffusion and in the WC–Co by deformation of the hard phase and diffusion of Co.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- DFT
- Plastic deformation
- Cemented carbides
- Internal friction
- Characterisation
Publication and Content Type
- art (subject category)
- ref (subject category)
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