TEMPERATURE FIELD EVOLUTION IN A HORIZONTAL SOLIDIFICATION EXPERIMENT AND ITS INFLUENCE ON MACROSTRUCTURE

摘要

A horizontal solidification benchmark experiment with a binary Sn-10%wtPb alloy is proposed. The experiment is aimed at investigating the effect of convection and especially buoyancy-driven flows. The experiment consists in solidifying a rectangular sample thanks to two lateral heat exchangers which allow applying a controlled horizontal temperature difference. An array of fifty thermocouples placed on the lateral wall allows the determination of the instantaneous temperature distribution. The heat transfer of the sample is valuated and the boundary conditions are validated. The temperature difference between each lateral wall is zero, and the cooling rates were set to 0.02K/s, and 0.04K/s respectively. The time evolution of the temperature field is measured and analyzed. This allows us to evaluate the natural convection, unsteady heat extracting during solidification, as well the influence on the solidification macrostructure.