Effect of interface chemistry and structure on grain morphology and plastic deformation of cemented carbides

Cemented carbides are used for metal cutting and rock drilling. They consist of micron-sized tungsten carbide grains that form a hard skeleton, surrounded by a tough, cobalt-rich binder phase. By different additions, both to the binder and the skeleton, and by wear resistant coatings the performance of cemented carbides can be dramatically improved. Today’s high cutting speeds give very high temperatures and loads, so plastic deformation (i.e. a shape change) is often the dominant wear mechanism. We are testing several WC-Co-based materials in hot compression, and we study the resulting deformation in great detail using electron microscopy and atom probe tomography (APT). In addition, an interatomic potential for the W-C-Co system has been developed, and molecular dynamics modeling is preformed of grain boundary sliding and grain boundary infiltration. The aim is to understand how different additions affect deformation mechanisms.

Partner organizations

  • Seco Tools (Private, Sweden)
  • Sandvik Coromant (Private, Sweden)
  • Sandvik Mining and Sandvik Construction (Private, Sweden)
  • Le laboratoire de Science et Ingénierie des Matériaux et Procédés (SIMaP) (Research institute, France)
  • Grenoble Institute of Technology (Grenoble INP) (Academic, France)
Start date 01/01/2014
End date The project is closed: 31/12/2016

Page manager Published: Wed 23 Nov 2016.