The role of alloying additives and aging treatment on the impact behavior of 319 cast alloy

Elsebaie, Ossama; Mohamed, A.M.A.; Samuel, A. M.; Samuel, F. H.; Al-Ahmari, Abdulrahman

doi:10.1016/j.matdes.2011.02.047

Cited by 43 publications

(16 citation statements)

References 14 publications

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“…A3 alloy resulted in increasing the alloy UTS after artificial aging at 160°C due to increase in the volume of precipitated Mg 2 Si phase particles [40]. As expected, increasing the iron content from 0.09% (A1 alloy) to~0.6% (C3 alloy) leads to significant decrease in the alloy strength after aging due to the presence of a large volume fraction of Fe-based intermetallics [41].…”

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confidence: 54%

Effect of intermetallics on the microstructure and tensile properties of aluminum based alloys: Role of Sr, Mg and Be addition

et al. 2015

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Section: Q-chartssupporting

confidence: 54%

Effect of intermetallics on the microstructure and tensile properties of aluminum based alloys: Role of Sr, Mg and Be addition

et al. 2015

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“…The effects of heat treatments in Al-Si-Cu alloys have been studied by different techniques from different authors 1,2,6,7 . The authors reported that β-Mg 2 Si, θ-Al 2 Cu, Al 2 CuMg, and Al 4 CuMg 5 Si 4 phases are dissolved during the SHT and are highly responsible of hardening of Al-Si-Cu-Mg, e.g.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure in Al-Si-Cu System Modified with a Transition Element Addition and its Effect on Hardness

et al. 2016

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The effect of Ni 1-2 wt.% addition on the microstructure and hardness of the aged A319 alloy were studied. Characterization analyses by x-ray diffraction, optical microscopy and scanning electron microscopy suggest clearly that Ni addition forms Al-Ni-Cu-Fe, Al-Cu-Ni and Al-Ni intermetallic compounds that correlates well with equilibria conditions. Analyses by transmission electron microscopy show that aging heat treatment promotes microstructural changes in morphology, size, and spatial distribution of precipitates. Vickers micro-hardness test of Ni 1 and 2 wt.% specimens have a hardness increase from that of A319 alloy of ~6-8% with mean values of 140.98 and 142.93 HV, respectively.

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“…As strontium modification is commonly used to alter the morphology of the eutectic Si particles in Al-Si alloys, the process is expected to affect the fracture behavior of the alloy. Elsebaie et al [13,14] studied the role of microstructure in relation to the toughness of hypoeutectic Al-Si casting alloys, using unnotched Charpy impact test samples. Additions of 0.017 or 0.03 wt % Sr were used to modify the alloys.…”

Section: Strontium Modificationmentioning

confidence: 99%

On the Fractography of Impact-Tested Samples of Al-Si Alloys for Automotive Alloys

Ma¹,

Samuel²,

Doty³

et al. 2016

Fracture Mechanics - Properties, Patterns and Behaviours

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Castings were prepared from both industrial and experimental 319.2, B319.2 and A356.2 alloy melts, containing Fe levels of 0.2-1.0 wt%. Stontium-modified (∼200 ppm) melts were also prepared for each alloy/Fe level. Impact testing of heat-treated samples was carried out using an instrumented Charpy impact testing machine. At low Fe levels and high cooling rates (0.4% Fe, dendrite arm spacing (DAS) of 23 μm), crack initiation and propagation in unmodified 319 alloys occur through the cleavage of β-Al 5 FeSi platelets (rather than by their decohesion from the matrix). The morphology of the platelets (individual or branched) is important in determining the direction of crack propagation. Cracks also propagate through the fracture of undissolved CuAl 2 or other Cu intermetallics, as well as through fragmented Si particles. In Sr-modified 319 alloys, cracks are mostly initiated by the fragmentation or cleavage of perforated β-phase platelets, in addition to that of coarse Si particles and undissolved Cu-intermetallics. In A356.2 alloys, cracks initiate mainly through the fracture of Si particles or their debonding from the Al matrix, while crack propagation occurs through the coalescence of fractured Si particles, except when β-Al 5 FeSi intermetallics are present, in which case the latter takes precedence. In the Sr-modified case, cracks propagate through the linkage of fractured/ debonded Si particles, as well as fragmented β-iron intermetallics. In samples exhibiting low-impact energies, crack initiation and propagation occur mainly through cleavage of the β-iron intermetallics.

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The role of alloying additives and aging treatment on the impact behavior of 319 cast alloy

Cited by 43 publications

References 14 publications

Effect of intermetallics on the microstructure and tensile properties of aluminum based alloys: Role of Sr, Mg and Be addition

Effect of intermetallics on the microstructure and tensile properties of aluminum based alloys: Role of Sr, Mg and Be addition

Evolution of Microstructure in Al-Si-Cu System Modified with a Transition Element Addition and its Effect on Hardness

On the Fractography of Impact-Tested Samples of Al-Si Alloys for Automotive Alloys

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