Compaction pressure and Si content effects on compressive strengths of Al/Si/Cu alloy composites

Distinct heat treatments and powder size ratios affecting mechanical responses of Al/Si/Cu composites

“…Previous results reported in literature [15][16][17][18][19][20][47][48][49] indicate that similar compressive strengths are reached. It is remarked that a dendritic spacing as microstructural array is constituted, mainly when the casting route is adopted.…”

“…On the other hand, the peaks associated with the Al 2 Cu phases are identified when all heat-treated samples are analyzed, as also previously reported. [14][15][16][17]20,24 Considering the mechanical behavior and correlating with those XRD patterns attained, when the T4 is carried out, it is observed that the UTS of the Al/4 þ 4 composite is $2 times higher than the Al/2 þ 2 composite. Similar magnitudes of the UTS values are also previously reported.…”

“…Similar magnitudes of the UTS values are also previously reported. [15][16][17]38,39 When a T4 is carried out during 3 months, an increase in the UTS results is observed. However, the highest UTS result is that of the composite with higher reinforcing particles content than the other samples examined.…”

“…Besides, it has been reported that the Al-based composites are commonly sintered under $70 and 85% of the melting temperature of the matrix, as also previously reported. 6,[14][15][16][17]20,21,[31][32][33][34][35][36][37][38][39]…”

“…The experimental investigations considering elemental powders to constitute Al composite using both ductile and hard particles are scarce. [14][15][16][17][18][19] From those reported studies, some complementary treatments or distinctive routes are considered, e.g. ball mill mixing, hot pressing, stirring and infiltration casting, [19][20][21][22][23][24][25][26] severe plastic deformation, and/or high long-term heat treatments (higher than 10 hours).…”