The stress–strain behavior of WC-Co hardmetals

• Published in: Computational materials science Vol. 49; no. 3; pp. 593 - 597
• Main Authors: Golovchan, V.T., Litoshenko, N.V.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2010; Elsevier
• Subjects: Algorithms; Applied sciences; Calculating algorithm; Carbides; Cemented carbides; Cobalt; Compressive strength; Elasticity. Plasticity; Exact sciences and technology; In situ deformation properties of constituents; Mathematical analysis; Mathematical models; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Stress strain curves; Stress-strain relationships; Tensile strength; Tungsten carbide; WC-Co hardmetals; WC-Co hardmetals; Calculating algorithm; In situ deformation properties of constituents; Compressive strength; Tensile strength; Stress–strain curves; Grain size; Tungsten carbide; Mean field approximation; Stress-strain curves; Stress strain relation; Cobalt; Compression test; Tension test; Composite material; Hard material; Analytical method; Computing method
• ISSN: 0927-0256; 1879-0801
• DOI: 10.1016/j.commatsci.2010.05.055

The calculating algorithm for construction of the stress–strain curves of WC-Co hardmetals in simple tension and compression has been described. The algorithm is based on the mathematical means of mechanics of composite materials and in situ deformation properties of constituents. The mean field approach has been applied. The stress–strain behavior depends on such microstructural parameters as cobalt volume fraction, mean carbide grain size, and contiguity of carbide phase. The technological thermal residual microstresses have been taken into account. The wide comparison of theoretical and available experimental results has been done. It has been shown, that the given calculating algorithm has the good predictive capability. The analytical expressions of tensile and compressive strength of WC-Co hardmetals have been given.