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Previously we investigated the effect of porosity on solid-particle erosion of metal–matrix composites (MMCs) using a dynamic wear simulation model and demonstrated a positive effect of porosity on the resistance of MMCs to erosion when the amount of pores was small. We have extended this work to other materials, including pure metal, ceramic, and ceramic–matrix composites (CMCs), in order to obtain...
It is generally agreed that porosity is detrimental to the wear resistance of materials. However, some experiments show contradictory results or exceptions. We have conducted a computational study to investigate the influence of porosity on solid-particle erosion of composite materials with the aim of clarifying relevant unclear issues. Using TiC/Cu as a sample composite, we have demonstrated that...
In the present work several titanium alloys were evaluated as matrixes for diamond tools. The purpose is to find new metal matrixes not containing cobalt or with the amount minimised. Due to the low expansion thermal coefficient of titanium, diamond composites were produced by pressureless sintering, that means a relevant economic saving. The effect of different Ti–Ni ratio and of small aluminum and...
A dynamic wear model was applied to simulate sliding processes with accounting for frictional heating. In this model, a sliding system includes three components: holder, slider, and counter block. The components are discretized and mapped onto discrete lattices. Each lattice site represents a small volume of the material involved, which may move under the influence of external contact force and the...
Solid-particle erosion is a complex surface damage process, strongly affected by mechanical and metallurgical factors. In this study, the surface damage of composite materials caused by solid-particle erosion was simulated using a dynamic computational model based on Newton's law of motion. In this model, a material system is discretized and mapped onto a discrete lattice. Each lattice site represents...
A micro-scale dynamic model (MSDM) was applied to simulate solid particle erosion. In this model, the target material and solid particles are discretized and mapped onto a square grid or lattice. Each lattice site represents a small volume of the materials. During an erosion process, a lattice site may move under the influence of external force and the interaction between the site and its adjacent...
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