Nanohardness of Individual Phases in WC – Co Cemented Carbides

Annamária Duszová; Radoslav Halgaš; Pavol  Priputen; Marek Bľanda; Pavol Hvizdoš; František Lofaj; Ján Dusza

doi:10.4028/www.scientific.net/KEM.586.23

Paper Titles

Characterization of Polypropylene Staple Yarns by Acoustic Dynamic Modulus
p.3

Development of Plastic Zones during the Thermal Cycle of Welding
p.11

Reduction of Elastic Modulus of Titanium Alloy Ti-6Al-4V by Quenching
p.15

Measurement of Local Initiation, Early Growth and Retardation of Physically Short Fatigue Cracks Using Amended DCPD Method
p.19

Nanohardness of Individual Phases in WC – Co Cemented Carbides
p.23

Influence of Loading Conditions on the Deformation Behavior of Human Enamel Studied by Instrumented Indentation
p.27

Effect of Crystallographic Orientation on Hardness and Indentation Modulus in Austenitic Stainless Steel
p.31

Nanohardness vs. Friction Behavior in Magnetron Sputtered and PECVD W-C Coatings
p.35

Estimation of Local Plastic Deformation of Polycrystalline Materials
p.39

HomeKey Engineering MaterialsKey Engineering Materials Vol. 586Nanohardness of Individual Phases in WC – Co...

Nanohardness of Individual Phases in WC – Co Cemented Carbides

Abstract:

The nanohardness of WC – Co hardmetals has been investigated using instrumented indentation and Berkovich tip indenter. The nanohardness, HIT, and indentation modulus, EIT, of Co phase and individual WC grains and the influence of their crystalographic orientation have been studied. SEM, AFM and EBSD methods were used for the characterization of the microstructures and indents and for the identification of crystallographic orientation of WC grains, respectively. Strong indentation load-size effect and significant influence of the crystallographic orientation of WC crystals on HIT and EIT have been found. The nanohardness of Co binder was approximately 10 GPa and that of WC grains varied between 25 and 50 GPa, depending on the grain orientation and load. The nanohardness values of the basal and prismatic planes of individual WC grains at load of 10 mN were 40.4 ± 1.6 GPa and 32.8 ± 2.0 GPa, respectively.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 586)

Pages:

23-26

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.586.23

Citation:

Cite this paper

Online since:

September 2013

Authors:

Annamária Duszová, Radoslav Halgaš, Pavol Priputen, Marek Bľanda, Pavol Hvizdoš, František Lofaj, Ján Dusza

Keywords:

Hardmetal, Hardness, Instrumented Indentation, Reduced Modulus

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] H.E. Exner, Physical and chemical nature of cemented carbides, Int. Met. Rev. 4 (1979) 149-173.

Google Scholar

[2] T. Takahashi, E.J. Freise, Philos. Mag. 12 (1964) 1-8.

Google Scholar

[3] L. Pons, Plastic properties in tungsten monocarbide, Anisotropy in single-crystal refractory compounds 2 (1968) 393-444.

Google Scholar

[4] N. Cuadrado, D. Casellas, L. Llanes, I. Gonzalez, J. Caro, Effect of Crystal Anisotropy on the Mechanical Properties of WC Embedded in WC-Co Cemented Carbides, Euro PM2011 – Hard Materials, CD, (2011).

Google Scholar

[5] V. Bonache, E. Rayón, M.D. Salvador, D. Busquets, Nanoindentation study of WC–12Co hardmetals obtained from nanocrystalline powders: Evaluation of hardness and modulus on individual phases, Materials Science and Engineering A527 (2010) 2935-2941.

DOI: 10.1016/j.msea.2010.01.026

Google Scholar

[6] B. Roebuck, P. Klose, K.P. Mingard, Hardness of hexagonal tungsten carbide crystals as a function of orientation, Acta. Mat. 60 (2012) 6131-6143.

DOI: 10.1016/j.actamat.2012.07.056

Google Scholar

[7] W.C. Oliver, G.M. Pharr, An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments, J. Mater. Res. 7 (1992) 1564-1583.

DOI: 10.1557/jmr.1992.1564

Google Scholar