Squeeze Casting of Al-Si Alloys

Bellisario, Denise; Boschetto, Alberto; Costanza, Girolamo; Elisa, T; Quadrini, Fabrizio; Santo, Loredana

doi:10.5772/32591

Cited by 1 publication

(1 citation statement)

References 18 publications

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“…To minimize the side effect of Sr addition, proper selection of casting processes becomes essential and critical, in which the advantages of alloying elements in AlÀ Si alloys could be maximized. Squeeze casting, also known as liquid metal forging, extrusion casting and pressure crystallization, has become an emerging technology for manufacturing light weight components alloy with aluminum and magnesium alloys [27][28][29][30][31][32][33][34][35][36][37][38]. This is because the process involves the solidification of a molten metal in a closed die under an imposed high pressure which keeps entrapped gases in solution and squeeze molten metal from hot spots to incipient shrinkage pores.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ni and Sr on the microstructure and tensile properties of the squeeze cast Al‐Si‐Cu alloy at elevated temperatures

Fang,

Hu,

Shen

et al. 2024

Materialwissenschaft Werkst

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The influence of the transition alloying element nickel and the alkaline earth element strontium on the microstructure and tensile properties of squeeze cast Al−Si‐Cu alloy under as‐cast condition at elevated temperature of 100 °C, 200 °C and 300 °C is investigated in comparison with the conventional Al−Si‐Cu alloy (A380). Aluminum alloy A380 is alloyed and modified with 2 wt% additional nickel (Ni) and 0.02 wt% strontium (Sr). Squeeze casting is employed to cast the modified A380 under an applied pressure of 90 MPa. The results of tensile testing at the selected elevated temperatures indicate that the Ni and Sr containing A380 alloy exhibits a significantly improvement on tensile properties, specifically ultimate tensile strength and yield strength with 10 %‐30 % increases. The as‐cast microstructures of both the conventional and Ni and Sr‐containing alloys are observed by an optical microscope and further analyzed with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The presence of Ni‐containing intermetallic phases with Ni addition, and the modified eutectic Si phase with refined morphologies due to the Sr addition should be responsible for the considerable enhancement on the as‐cast strengths of the squeeze cast Ni‐ and Sr‐containing alloy over those of the conventional A380 alloy.

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