Hardmetals: Notch effects on the fatigue endurance of cemented carbides

Notch effects on the fatigue resistance of two microstructurally different WC-Co cemented carbides have been studied. Hardness, mechanical strength, fracture toughness and fatigue endurance corresponding to infinite fatigue life of 2 x 10^sup 6^ cycles, have been evaluated in both smooth and notched...

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Bibliographic Details
Published inEuropean Congress and Exhibition on Powder Metallurgy. European PM Conference Proceedings p. 1
Main Authors Coureaux, D, Reig, B, Rimbau, V, D'Armas, H, Mestra, A, Llanes, L
Format Conference Proceeding
LanguageEnglish
Published Shrewsbury The European Powder Metallurgy Association 01.01.2013
Subjects
Ductility
Influence
Microstructure
Stress concentration
Studies
Trends
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Summary:Notch effects on the fatigue resistance of two microstructurally different WC-Co cemented carbides have been studied. Hardness, mechanical strength, fracture toughness and fatigue endurance corresponding to infinite fatigue life of 2 x 10^sup 6^ cycles, have been evaluated in both smooth and notched specimens. Results indicate clear but inverse microstructural effects on intrinsic susceptibility to mechanical degradation and notch sensitivity under cyclic loads. The findings are discussed on the basis of the role played by the binder mean free path (key two-phase microstructural parameter), through its effective ductility in a constrained state, in toughening, fatigue and local plasticity development at the notch tip.