A study on the composition optimization and mechanical properties of Al–Mg–Si cast alloys

Dilatometric Study of Two based Aluminium Sheets

“…The observed weak expansion along Z direction in the case of the sheet been taken. The shape of the thermal expansion coefficients curves of for samples taken along X and Y directions appear to be similar, as they present similar dilatometric anomalous which correspond to different reactions of the precipitation sequences of this alloy as reported in the literature [12][13][14][15][16] are as follows:…”

Influence of the chemical composition and process parameters on the mechanical properties of an extruded aluminium alloy for highly loaded structural parts

“…Analyses of the precipitated phases in these alloys carried out by various authors did not produce entirely matching results about the phases; this is attributed to the different processing conditions and the initial chemical compositions of these alloys. Thus Mrówka-Nowotnik et al [31] in a detailed investigation of as-cast AA6082 revealed that this consists of the following constituents: a-Al, ß-Al 5 FeSi, a-AlFeSi, a-Al 15 (FeMn) 3 Si, b-Al 9 Mn 3 Si, a-Al 12 Fe 3 Si, Mg 2 Si, while other authors [9][10][11][12][13][14][15][16][17] reported the presence also of a(Al 8 Fe 2 Si), ß(Al 5 FeSi), b-Al 9 Fe 2 Si 2 and p(Al 8 FeMg 3 Si 6 ) in these alloys. 3 Si or a-Al 12 (FeCr) 3 Si, which are detrimental to the mechanical properties of the alloys.…”

“…It is known that, the mechanical properties of Al alloys are also closely related to the content of alloying elements [9][10][11][12][13][14][15][16][17][18] as well as to the applied process parameters, i.e., casting, homogenization, heating, deformation parameters, heat treatments, etc., [19][20][21][22][23][24][25][26][27][28][29][30]. This means that improving the main mechanical properties of an aluminium alloy, i.e., tensile strength, yield stress, hardness and ductility, is achieved by adding alloying elements, like Mg, Si, Mn, Fe, Cr, etc., since these favour a specific morphology, crystallography and chemical composition of the intermetallic phases in the microstructure [9][10][11][12][13][14][15][16][17][18]31], on the one hand, while with the correct selection of process parameters, the desired characteristics of the intermetallic phases in terms of size, as well as their shape, fraction, distribution, etc., in the final microstructure [19][20][21][22][23][24][25][26][27][2...…”

“…This means that improving the main mechanical properties of an aluminium alloy, i.e., tensile strength, yield stress, hardness and ductility, is achieved by adding alloying elements, like Mg, Si, Mn, Fe, Cr, etc., since these favour a specific morphology, crystallography and chemical composition of the intermetallic phases in the microstructure [9][10][11][12][13][14][15][16][17][18]31], on the one hand, while with the correct selection of process parameters, the desired characteristics of the intermetallic phases in terms of size, as well as their shape, fraction, distribution, etc., in the final microstructure [19][20][21][22][23][24][25][26][27][28][29][30], can be achieved, on the other. Consequently, both strongly affect the properties of the alloy in a complex way.…”

“…3 Si or a-Al 12 (FeCr) 3 Si, which are detrimental to the mechanical properties of the alloys. Furthermore, Cu is added to impart heat treatability to the castings through the formation of the Al 2 Cu phase [9][10][11][12][13][14][15][16][17]31]. Furthermore, some authors [18] reported that Cu can contribute to increasing of strength due to formation of Q-phase (Al 5 Cu 2 Mg 8 Si 6 ).…”