Effect of cobalt on structure and properties of fast-cutting steel

A New Criterion for Predicting Rolling-Element Fatigue Lives of Through-Hardened Steels

“…It has been suggested that cobalt may decrease the fracture toughness of the material [15]. In addition, a Russian paper [17] suggested that the nonuniformity of the material increased due where K-, Kg, Kg, and K 4 are constants. From equations (7) and (8) S« can be expressed in terms of S« as follows:…”