Primary Crystallization of High Chromium Cast Steel in Metastable Conditions

The analysis of the primary crystallization of wear corrosive-erosive high chromium cast steel was introduced in the article on the basis of investigations the widened method of the differential thermal analysis with testers DTA-C and DTA-Is. The use of these testers enabled the analysis of crystallization for the various rates of cooling

Technological aspects of AlSi-Cr x C y composite casting manufacturing with use of permanent moulds

Abstract In this work authors presented the restrictions and possibilities of permanent mould casting technique in manufacturing dispersive composite elements reinforced with metallic particles. The characteristic feature of such particles is their physical and chemical reactivity, which deteriorates the rheological properties of the liquid dispersion. Selection of technological parameters for manufacturing and casting is aimed on proper filling of the mould with liquid dispersion. For comparison, the results of similar experiments with use of investment casting were shown. Basic constructional requirements connected with brake discs manufacturing were presented, together with the concept of moulding materials selection, influencing the flow of liquid dispersion. As the results of conducted studies technological parameters of brake disc manufacturing with use of AlSi-Cr x C y composites were determined

Simulation of high Schmidt number fluids with dissipative particle dynamics: Parameter identification and robust viscosity evaluation

Dissipative particle dynamics (DPD) is a widely used coarse-grained technique for the simulation of complex fluids. Although the method is capable of describing the hydrodynamics of any fluid, the common choice of DPD parameters, such as friction coefficient γ, dissipative cutoff radius , coarse-graining factor Nm and weighting function exponent s, unrealistically leads to the simulation of liquid water with a low Schmidt number Sc at standard pressure and temperature. In this work we explored the influence of these parameters, finding the set of parameters needed to properly simulate liquid water. Particular attention was devoted to the numerical techniques to calculate the transport properties from equilibrium simulations, especially in the calculation of the viscosity, comparing the most commonly adopted techniques and formulating a recipe that can be used for further investigations