High temperature mechanical properties of WC-Co hard metals

Autor(en)

T. Teppernegg, T. Kluensner, C. Kremsner, C. Tritremmel, C. Czettl, S. Puchegger, S. Marsoner, R. Pippan, R. Ebner

Abstrakt

Understanding of the load situation and consequently the lifetime of cutting tools made of WC-Co hard metal requires quantitative data for thermo-mechanical properties. For the elevated temperatures present in application, these data are currently rather rare. The present work does discuss elastic material properties up to 1100 °C and compressive yield strength up to 900 °C, both as a function of Co content. The fracture toughness was determined as a function of the WC grain size and Co content up to 800 °C. Young's modulus and yield strength decrease with increasing temperature. A significant rise in fracture toughness was observed at 800 °C with increasing Co content and decreasing WC grain size. A possible reason for this increase is an increase in the plastic zone size at elevated temperatures.

Organisation(en)

Fakultätszentrum für Nanostrukturforschung

Externe Organisation(en)

Materials Center Leoben, Forschung GmbH, CERATIZIT Austria Gesellschaft m.b.H., Österreichische Akademie der Wissenschaften (ÖAW)

Journal

International Journal of Refractory Metals and Hard Materials

Band

56

Seiten

139-144

Anzahl der Seiten

6

ISSN

0263-4368

DOI

https://doi.org/10.1016/j.ijrmhm.2016.01.002

Publikationsdatum

04-2016

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Mechanics of Materials, Ceramics and Composites, Mechanical Engineering, Metals and Alloys, Materials Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/9a38768f-f32c-46d7-9710-7f31ac9fd1de