Experimental study of WC–Co cemented carbide air impact rotary drill teeth based on failure analysis

Modes of failure of cemented tungsten carbide tool bits (WC/Co): A study of wear parts

“…Which illustrate the rock scraping of the tungsten carbide tool bit tooth (A), morphology of shock flaking (B), impact fatigue fracture (C) and spalling pits and cracks (D)[27].…”

Failure analysis and optimum structure design of PDC cutter

“…5 and Fig. 6, when PDC cutters are impacted, the dislocation will be caused between the particles of bonding phase Co and carbide phase WC, and therefore the stress concentration will be caused due to the accumulation of dislocation and transposition [19]; simultaneously, the inconsistent plastic deformation of Co and WC under high stress will cause de-bonding which results in vacancies among the crystal particles; after certain cycles, the voids and micro-cracks will be formed and then communicated with each other to accelerate the development of their intra-crystalline expansion into the trans-crystalline breakage. Such micro-cracks, generally originated from the stripping surface of PCD, will be expanded and deepened to cause new micro laminar stripping.…”

A Gear Form-Grinding Optimization Method Based on Neural Network

“…It's noteworthy that there are number of studies carried out recently in relation to these gears [39,40]. Many applications, e.g., automobile [41,42] and tunnel boring machines [43,44] require high reliability of gearboxes. Some neural network methods are also used for gear manufacturing to improve the accuracy of machine-tools [45,46].…”