Purpose: The study was to determine the mechanical properties of hypo-eutectic silumin
AlSi12 modified with Sr or Al-Sr alloy slow or fast cooled and in the form of a strip or powder.
Design/methodology/approach: The experiment performed on EN AB-AlSi12 hypoeutectic
alloy. Aluminium and strontium was melted and next fast cooled to room
temperature or cooled on a metal plate at rates about 200°C/s. This enabled to produce a
different components, which were powdered immediately before adding to the alloy or used
as a strip. The scope of this paper was to verify the cooling effect of Sr-Al modifiers and
its form (powder or strip) on the microstructure and mechanical properties the AlSi12 alloy.
Findings: The use of fast cooled Al-Sr alloy in the modification process and/or powdered
alloy contributed to a further increase mechanical properties AlSi12 alloy.
Research limitations/implications: The modification alloys with fast cooled powdered
modifier are attractive for future research.
Practical implications: Widely presented books and research papers on the silumin treatment
give not a lot of contents on the effect treatment fast cooled alloy in the form of a strip or powder.
Originality/value: The original value of the paper is comparison Sr and Al-Sr alloy
modifiers slow and fast cooled and used as a powder or strip.