Tensile properties and hot tearing susceptibility of cast Al-Cu alloys containing excess Fe and Si

Ganjehfard, Khalil; Taghiabadi, R.; Noghani, Mohammad Talafi; Ghoncheh, M.H.

doi:10.1007/s12613-020-2039-7

Cited by 28 publications

(11 citation statements)

References 32 publications

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“…Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti (wt.%) alloy However, Al-Cu-Mg alloys are extremely susceptible to hot tearing, due to their long solidification ranges [8,9] , leading to a fracture as a result of strain localization in the solidifying alloy above its non-equilibrium solidus temperature [10,11] . The grain refinement of the as-cast structure using inoculation of grain refiners in the molten alloy is an approach to avoiding the formation of the hot tearing in Al-Cu-Mg alloys [10][11][12] .…”

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confidence: 99%

Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti (wt.%) alloy

Kamali

Emamy

2022

China Foundry

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Al-Cu-Mg alloys have widespread applications in the aerospace and transportation industries, due to their high specific strength [1] , good oxidation and corrosion resistance, high melting temperature (among Al alloys), and good thermal conductivity [2] . The excellent strength properties of these age-hardenable Al alloys originate from precipitation of the nanoscale metastable phases [1,3,4] , namely θ"-Al 3 Cu with a tetragonal structure (a=0.404 nm and c=0.768 nm), θ'-Al 2 Cu with a tetragonal structure (a=0.404 nm and c=0.580 nm) [3,5,6] , GPB2/S"-Al 10 Cu 3 Mg 3 with an orthorhombic structure (a=0.405 nm, b=1.620 nm and c=0.405 nm) [5,7] , and S'-Al 2 CuMg with an orthorhombic structure (a=0.405 nm, b=0.916 nm and c=0.720 nm) [1,5,6] , in α-Al matrix during age hardening treatments.

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confidence: 99%

Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti (wt.%) alloy

Kamali

Emamy

2022

China Foundry

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“…This can be primarily explained by higher fraction of hard Si platelets within the matrix (Fig. 3) which can serve as barriers to dislocation motion [1]. Furthermore, Si addition lowers the number of shrinkage porosities that act as stress concentrators/microcrack initiators in the microstructure (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Adding higher amounts of Si (more than 3.0 wt.%) increases the size and volume fraction of hard Si particles (> 100 KHN) [1], decreases the fraction of micropores in the microstructure (Table 2) and, accordingly, enhances the alloy hardness at the expense of its tensile properties (Fig. 5).…”

Section: Methodsmentioning

confidence: 99%

“…Due to their high specific strength, high ductility, good fracture toughness, and high low-cycle fatigue strength, hypoeutectic Al-Cu alloys have great industrial importance, especially in automotive and aerospace fields [1]. For example, they are used for fabricating gear and pump housings [2], speed brakes, hydraulic pumps, fuel pumps, brake valves, armored cupolas, etc.…”

Section: Introductionmentioning

confidence: 99%

“…This is because the high latent heat of Si crystals released during their precipitation in molten Al prolongs the solidification process, thereby enhancing the liquid fluidity [7]. Adding optimal amounts of Si also reduces the solidification shrinkage and improves the hardness and tensile strength of Al-Cu alloys [1,7]. Apart from these positive impacts, the presence of coarse needle-like Si particles in the microstructure of Al-Cu alloys can significantly deteriorate their mechanical properties especially their ductility and fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the mechanical properties of Al-4.5Cu-xSi alloys through multi-pass friction stir processing and post-process aging

Mostafavi

Taghiabadi

Jafarzadegan

2021

Archiv.Civ.Mech.Eng

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The effect of post-process aging on the microstructure and mechanical properties of multi-pass friction stir processed (FSPed) Al-4.5Cu alloy containing Si (1, 3, and 5 wt.%) was studied. According to the results, adding Si improved the fluidity and decreased the porosity content of the alloy. The addition of Si up to 3 wt.% also enhanced the mechanical properties. However, further addition of Si up to 5 wt.% impaired the tensile properties. Applying the first pass of FSP improved the tensile strength and fracture strain of the alloy containing 3 wt.% Si by 25 and 125%, respectively. However, the second and fourth pass of FSP substantially improved the fracture strain, but deteriorated the hardness and tensile strength of the alloy containing 3 wt.% Si. Post-FSP aging at 180 °C for 8 h significantly improved the mechanical properties. For instance, compared to the as-cast condition, the hardness, tensile strength, fracture strain, and toughness of post-aged four-pass FSPed Al-4.5Cu-3Si alloy increased by 107, 108, 175, and 310%, respectively. According to the fractography results, the fracture surface morphology of Al-4.5Cu-3Si alloy changed from a quasi-cleavage mode in as-cast condition to a ductile-dimple fracture mode after post-FSP aging.

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Unidirectional flipped multiple-pass friction stir process: an innovative step in the fabrication of in situ Al-Cu composites

Bajakke,

Malik,

Jambagi

et al. 2024

Int J Adv Manuf Technol

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Tensile properties and hot tearing susceptibility of cast Al-Cu alloys containing excess Fe and Si

Cited by 28 publications

References 32 publications

Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti (wt.%) alloy

Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti (wt.%) alloy

Optimizing the mechanical properties of Al-4.5Cu-xSi alloys through multi-pass friction stir processing and post-process aging

Unidirectional flipped multiple-pass friction stir process: an innovative step in the fabrication of in situ Al-Cu composites

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