Prakt. Met. Sonderband 41 (2009) 287 
Conclusions 
The investigation revealed that the modification of the AlSi6Cu4 silumin with the additives 0,2% 
AITi5B1 and 0,3% AlSr10 simultaneously provided the advantageous refinement of the a-phase 
dendrites as well as the change of the morphology of the eutectic silicon from the lamellar into the 
fibrous one. The change resulted in a double increase in the impact resistance of the alloy and the 
widening of the plastic area of the fracture of the silumin samples. 
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