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Experimental investigations encompass the effect of melt pouring rate and melt pouring height on solidification, microstructure and mechanical properties of A356 aluminium alloy aimed at semisolid casting via cooling slope. Melt pouring rate with melt pouring height ensure about necessary amount of solidification with required shear for generating semisolid slurry. Moderate melt pouring rate of 0.025 kg s −1  with melt pouring height of 0.2 m brings quite a modest solidification which would absolutely contribute toward enhanced overall (microstructural/mechanical) properties aimed at semisolid casting. Because pretty smaller melt pouring rate/height would cause less shearing, however, bigger melt pouring rate/height has a coarsening effect (which opposes grain refinement) resulting from coalescence/agglomeration of neighbouring dendrite arms and Ostwald ripening owing to increasing diffusion in liquid. It results in inferior overall (microstructural/mechanical) properties with exceedingly undesirable and adverse challenges in semisolid casting. As, during treatment escaping/retaining of gases, waste metals alongside alloy elements occurs. Because smaller melt pouring rate/height lets alloy elements escape hence decreases strength and vice-versa. Furthermore, smaller melt pouring rate/height also lets gases alongside waste metals escape hence enhances strength and vice-versa. Hence, moderate parameter intensities for semisolid casting ensure solution to perplexity.

Effect of melt pouring rate and height on solidification, microstructure and mechanical properties of A356 aluminium alloy casted via cooling slope