[en] directional solidification ; microporosity ; LiMaRC - Liège Materials Research Center
[en] The aim of this experiment was to study the origin and formation of microporosities in a Ni-5% Ti-0.2% C alloy which has been solidified and quenched, and to compare it to the previously developed mathematical model. In the selected alloy, the porosity may result from gases formed during solidification (for example by chemical reaction). The results show that solidification conditions influence microporosity formation through the fraction eutectic and this suggests that it is possible to relate susceptibility to microporosity formation to the fraction eutectic. The results also confirm that for solid solution alloys such as Ni-5% Ti0.2% C, the fraction eutectic increases when the ratio G/R decreases.