Effect of Grain Refining on the Shrinkage Porosity in Thin-Walled Plates Produced by Investment Casting Integrating Controlled Solidification TechniqueFranse Duiker, Pierre Rossouw, Gonasagren Govender and Ulyate CurleMATEC Web Conf., 370 (2022) 04005DOI: https://doi.org/10.1051/matecconf/202237004005