The effect of strontium on the mechanical properties of aluminum–silicon alloy

Influence of modifying elements on the structure and mechanical properties of casting Al-Si alloys

“…Strontium is currently the most widely used modifier of aluminum−silicon alloys and an element [10,22,24,[29][30][31][32][33][34][35][36][37][38][39][40][41] that attracts the attention of researchers. Strontium, like sodium, causes the refinement of the aluminum-silicon eutectic, a change in the coarse lamellar shape of silicon to a fine fibrous one (Fig.…”

“…In the paper [41], the effect of modifying with strontium a hypereutectic alloy of the composition Al−15%Si, the samples of which were formed by the method of directional crystallization (the Stepanov method) at two solidification rates, 10 3 µm/s and 10 2 µm/s, on its structure and strength characteristics. Samples in the form of rods were obtained by drawing the melt at a constant speed through a forming device, followed by crystallization under air cooling conditions.…”

Microstructure and Mechanical Properties of Al–12.6Si Eutectic Alloy Modified with Al–5Ti Master Alloy

“…[1] Eutectic Al-Si alloys have been widely used in the casting industry due to their low cost, low thermal expansion coefficient, high temperature strength, good castability, excellent wear and corrosion resistance, and high strength-to-weight ratio. [7][8][9][10] Besides fast cooling rate and vibration, the typical method of refining the eutectic Al-Si alloy microstructure is the addition of certain modifying elements. [2][3][4][5][6] Grain size, dendritic arm spacing, as well as morphology of eutectic silicon are critical microstructural factors that affect the mechanical properties of eutectic Al-Si alloys.…”

“…Such properties are attractive to the automobile industry, particularly for engine blocks, pistons cylinder heads, chain cover, and valve lifters. [11,12] Alloying with Ti, [13] B, [14][15][16] Sr, [8,17] rare earth elements such as Sc, [18] La, [19,20] Ce, [2] Nd, [21] Sm, [22] Eu, [23,24] Er, [25] and Yb [26,27] has shown to effectively improve both microstructure and tensile properties of eutectic Al-Si alloys. [7][8][9][10] Besides fast cooling rate and vibration, the typical method of refining the eutectic Al-Si alloy microstructure is the addition of certain modifying elements.…”

“…[2][3][4][5][6] Grain size, dendritic arm spacing, as well as morphology of eutectic silicon are critical microstructural factors that affect the mechanical properties of eutectic Al-Si alloys. [7][8][9][10] Besides fast cooling rate and vibration, the typical method of refining the eutectic Al-Si alloy microstructure is the addition of certain modifying elements. [11,12] Alloying with Ti, [13] B, [14][15][16] Sr, [8,17] rare earth elements such as Sc, [18] La, [19,20] Ce, [2] Nd, [21] Sm, [22] Eu, [23,24] Er, [25] and Yb [26,27] has shown to effectively improve both microstructure and tensile properties of eutectic Al-Si alloys.…”