Sökning: "cemented carbides"

Visar resultat 11 - 15 av 46 avhandlingar innehållade orden cemented carbides.

1. 11. Computational investigation of interface structure and composition in cemented carbides at finite temperatures

   Författare :Erik Fransson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Molecular dynamics; Hard Metals; Interfacial free energies; Monte Carlo; Cemented carbides; Force constants; Cluster expansion;

   Sammanfattning : WC-Co cemented carbides combine superb hardness with high toughness making them ideal for usage in high-speed machining of steels and in wear resistance tools. These excellent mechanical properties are to a large extent dependent on the microstructure and thus the interfacial properties of the material. LÄS MER

3. 12. WC grain growth during sintering of cemented carbides : Experiments and simulations

   Författare :Karin Mannesson; John Ågren; Annika Borgenstam; Håkan Engqvist; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cemented carbide; Grain growth; Abnormal grain growth; Image analysis; Modeling; 3-D grain size distribution; Inverse Saltykov; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Cemented carbides are composite materials consisting of a hard carbide and a ductile binder. They are powdermetallurgically manufactured, where liquid-phase sintering is one of the main steps. The most common cemented carbide consists of WC and Co and it is widely used for cutting tools. LÄS MER

4. 13. ICME guided development of cemented carbides with alternative binder systems

   Författare :Martin Walbrühl; John Ågren; Annika Borgenstam; Henrik Larsson; Claudio Miguel Lousada Patricio; Jan Qvick; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cemented carbide; ICME; Materials Design; alternative binder; hardness; AIMD; liquid diffusion; frozen-in solubilities; DICTRA; surface gradients; labyrinth factor; Materials Science and Engineering; Teknisk materialvetenskap;

   Sammanfattning : The development of alternative binder systems for tungsten carbide (WC) based cemented carbides has again become of relevance due to possible changes in EU regulations regarding the use of Cobalt (Co). A framework for the ICME (Integrated Computational Materials Engineering) based Materials Design is presented to accelerate the development of alternative binder systems. LÄS MER

5. 14. Evolution of WC-Co cemented carbide microstructure during creep testing

   Författare :Mohamed Amine Yousfi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plastic deformation; cemented carbides; linear intercept; transmission electron microscopy.; electron backscattered diffraction; Atom probe tomography;

   Sammanfattning : The aim of this work is to understand the mechanisms behind the plastic deformation of WC-­Co based cemented carbides. The microstructures of two materials have been investigated before and after creep deformation using quantitative microscopy, atom probe tomography, and transmission electron microscopy. LÄS MER

7. 15. Microstructural aspects on wear of cemented carbides

   Författare :Håkan Engqvist; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; Materialvetenskap; Materials Science;

   Sammanfattning : Cemented carbides are known to be very wear resistant and are therefore often usedin applications involving surface damage and wear. The work presented hereinvestigates the coupling between the microstructure and some fundamental wearand deformation mechanisms typical for cemented carbides. LÄS MER