Rheocasting slurries behave differently, offering advantages in high pressure die casting dies. Unlike traditional HPDC, where liquid metal quickly fills every corner, semi-solid slurry tends to flow straight, potentially ignoring perpendicular features initially and leading to porosity or defects if air gets trapped. The 2022 NADCA paper by Hartlieb, Jansson, Tawil, and Bergeron explains that the laminar flow of Rheocasting pushes air out of the cavity without entrapping it, filling even thin and tall ribs easily. For more insights, refer to their detailed study on Rheocasting for Rivian’s production.