Investigation of Rheological Behaviour of Liquid and Semi-solid Magnesium Alloys of Mg–Zn–Al, Mg–Zn–RE Groups

Ślęzak, Marta

doi:10.1134/s0018151x19060142

Cited by 2 publications

(1 citation statement)

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“…There is conflicting evidence in the literature as to whether behavior during shear rate transitions, for non-dendritic semisolid metals, are shear thinning or shear thickening [ 23 ]. Solid particles suspended in the liquid have a tendency to agglomerate, which increases the viscosity of the semisolid slurry, increasing this tendency with the application of external shear forces [ 3 ] especially at low shear rates [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

Rheological Behavior of the A356 Alloy in the Semisolid State at Low Shear Rates

et al. 2023

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To control the semisolid processing of aluminum alloys produced by the additive manufacturing technique, an exhaustive knowledge of their rheological behavior is required. In the semisolid state, metallic materials can show rheological characteristics similar to those of polymers, so semisolid state shaping is one of the currently considered routes for additive manufacturing with metallic materials. In this work, an approximation of the rheological control of the A356 aluminum alloy for its subsequent 3D manufacturing was carried out at a very low shear rate. A continuous cooling rheometer was designed and used, evaluating the influence of different process parameters on the viscosity variation of the aluminum alloy in the semisolid state. The results show an anomalous flow variation, indicating dilatant, and not thixotropic behavior, for very low shear rates.

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Section: Resultsmentioning

confidence: 99%