The rapid prediction of the modification level of Al-Si alloys by surface tension

Abstract

Research Summary Aluminum: Cast Shop and AlloysBoth the theoretical analysis and experiments on Al-Si alloys have shown that a relationship between the surface tension and the modifi cation of Al-Si alloys exists. A new method for the rapid prediction of the the modifi cation level of Al-Si alloys by surface tension has been introduced. The quantity of the modifi er is found to have the greatest effect, followed by the time of the modifi cation and then the temperature. In Al-Si alloys, when the surface tension is above 530 mN/m, the modifi cation level is partial. When the surface tension is between 400 mN/m and 530 mN/m, the modifi cation level is moderate. When the surface tension is below 400 mN/m, the modifi cation level is perfect.

Microstructure modification by La2O3 and its effect on wear resistance properties of as-cast ZL107 alloy

“…As a result, the reentrant edge will also form in front of the twin plane. Therefore, the growth direction of the silicon phase will be changed by the reentrant edge, because modifiers such as rare earth elements are capable of selective absorption in the reentrant edge and reduce the growth speed of the silicon phase and finally the silicon phase morphology changes [13][14]. The sketch of the twins and their reentrant edge is shown in Fig.…”