On the precipitation of silicon out of a supersaturated aluminum-silicon solid solution

Rosenbaum, H.S.; Turnbull, David

doi:10.1016/0001-6160(58)90160-3

Cited by 113 publications

(18 citation statements)

References 4 publications

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“…However, neither is available: extensive DSC experiments on binary Al-Si alloys by several researchers [74,75,76] have shown that any dissolution of Si clusters is not detectable. We can, however, use data on the small strengthening effect due to the pre-aging at room temperature of Al-Si alloys (about 11±4 MPa [77]) with our model in Section 2.2 to estimate the bond enthalpy of the Si clusters, ΔH Si-Si . This provides ΔH Si-Si = 9±3 kJ/mol.…”

Section: Expanding the Model To Include Both Co-clusters And Si-si CLmentioning

confidence: 99%

A model for the thermodynamics of and strengthening due to co-clusters in Al–Mg–Si-based alloys

2012

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An expanded model for the thermodynamics of co-clusters and their strengthening is presented, and the model is applied to predict co-cluster formation and strengthening in AlMg-Si alloys. The models are tested against data on a wide range of Al-Mg-Si alloys aged at room temperature. The strengthening due to co-clusters is predicted well. The formation of the co-clusters is studied in an Al-0.5at%Mg-1at%Si alloy using three-dimensional atom probe analysis. The results correspond well with the model. It is shown that in general, (shortrange) order strengthening due to co-clusters will be the main strengthening mechanism in these alloys. Apart from the co-clusters, Si clusters also form, but due to their low enthalpy of formation, they contribute little to the strength.

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Section: Expanding the Model To Include Both Co-clusters And Si-si CLmentioning

confidence: 99%

A model for the thermodynamics of and strengthening due to co-clusters in Al–Mg–Si-based alloys

2012

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“…It was reported [22,23] that the nucleation of precipitates in Al-Si alloys was enhanced by preaging quenched specimens near room temperature. Such enhancement can be attributed to the formed loops which act as precipitation centers for Si atoms, thus stabilizing them.…”

Section: Discussionmentioning

confidence: 99%

Effect of Sn content on the structural and mechanical properties of Al–Si alloy

El‐Salam

El-Khalek

Nada

et al. 2010

Materials Science and Engineering: A

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“…Generally, Al-Si system alloys are precipitation-hardened aluminum alloys. The Si phase is precipitated finely in the specimen [4][5][6] when a specimen of an Al-Si alloy is aged at a high temperature of about 473 K. In earlier studies, the authors investigated the formation of Si phase on the precipitation process in an Al-1.2% Si alloy by TEM observation, and it has been concluded that a plate-like Si-phase precipitate existed on the {111} plane at the initial stage of several tens of seconds of the precipitation process. 7) Subsequently, the thickness and length of the plate-like Si phase increased with increasing aging time.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging Treatment on Ultra-Fine Grains and Si-Phase in Al-0.5%Si Alloy Fabricated by ARB Process

et al. 2011

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Using TEM observation and Vickers micro-hardness measurements, this study investigated microstructural changes resulting from aging treatment of ultrafine-grained (UFG) Al-0.5%Si alloy fabricated with a six-cycle accumulative roll-bonding (ARB) process, which includes severe plastic deformation. Results show that the mean grain size of the UFGed Al-0.5%Si alloy produced by the ARB was 253 nm. The hardness of specimens aged at 373 K and 423 K decreased monotonously with increasing aging time in the initial stage of aging. The hardness value of the specimen aged at 373 K then became higher than the value of the specimen aged at 423 K after 10 ks. TEM observation revealed that the mean grain size of the UFG specimen aged at 373 K was less than that of the specimen aged at 423 K. Moreover, results confirmed that Si phase precipitates on the {111} planes on the matrix in the UFG specimen aged at 373 K and 423 K. The mean size of Si-phase in the UFG increased with aging time. The Si phase formation in the UFG specimen aged at 373 K is less than that of 423 K in long-term aging. However, the formation of Si phase on the grain boundaries is more conspicuous than in UFG specimens aged at 373 K and 423 K. These results suggest that restraint of the growth of UFG with aging resulted from Si phase precipitation on the grain boundary and lowering of the aging temperature. Moreover the formation of Si-phase in the UFG suggests precipitation hardening in the ARB-processed Al-Si alloy.

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On the precipitation of silicon out of a supersaturated aluminum-silicon solid solution

Cited by 113 publications

References 4 publications

A model for the thermodynamics of and strengthening due to co-clusters in Al–Mg–Si-based alloys

A model for the thermodynamics of and strengthening due to co-clusters in Al–Mg–Si-based alloys

Effect of Sn content on the structural and mechanical properties of Al–Si alloy

Effect of Aging Treatment on Ultra-Fine Grains and Si-Phase in Al-0.5%Si Alloy Fabricated by ARB Process

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