Contribution of microstructural parameters to strengthening in an ultrafine-grained Al–7% Si alloy processed by severe deformation

Gutiérrez-Urrutia, I.; Muñoz-Morris, Ma Antonia; Morris, David G.

doi:10.1016/j.actamat.2006.09.037

Cited by 160 publications

(65 citation statements)

References 33 publications

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“…According to this work, annealing at 310 • C results in modest reduction of the volume fraction of the secondary phase from 2.4% to 1.7% and in only a slight increase of the grain size. The role of large particles in accelerating structural refinement during severe plastic deformation has been demonstrated based on the formation of large strain and misorientation gradients in the matrix close to these particles [48][49][50]. ECAP is known as an efficient technique, which is used for the breakdown of the coarse as-cast structure [51].…”

Section: Resultsmentioning

confidence: 99%

Evolution of Mechanical Twinning during Cyclic Deformation of Mg-Zn-Ca Alloys

Vinogradov

Васильев

Linderov

et al. 2016

Metals

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Abstract:The present study clarifies the complex interplay between mechanical twinning and dislocation slip during low-cycle fatigue testing of Mg-Zn-Ca alloys. Temporal details of these mechanisms are studied non-destructively by in situ monitoring of the acoustic emission (AE) response powered by a robust signal categorization. Through the analysis of AE time series, the kinetics of deformation twinning per cycle and the overall accumulation of twinning during cyclic loading is described and its effect on fatigue life is highlighted.

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Section: Resultsmentioning

confidence: 99%

Evolution of Mechanical Twinning during Cyclic Deformation of Mg-Zn-Ca Alloys

Vinogradov

Васильев

Linderov

et al. 2016

Metals

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“…This shape had a negative influence on the mechanical properties of the extruded rods. Based on the results of a uniaxial tensile test and microhardness measurements, it can be concluded that changes in the distribution of phases and their morphology resulting from RS are directly reflected in the increase of mechanical properties [9,15,16]. The results presented in Figure 5 suggest that alloys made by rapid solidification preserve their high strength and plasticity.…”

Section: Mechanical Propertiesmentioning

confidence: 85%

SELECTION OF OPTIMAL CONDITIONS FOR SOLID BONDING OF THE AlSi11 ALUMINIUM ALLOY

Wzorek

Wiewióra

Wędrychowicz

et al. 2016

mafe

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1Effect of rapid solidification aluminum alloys with different Si contents on mechanical properties and microstructureWpływ szybkiej krystalizacji stopów aluminium z różną zawartością Si na własności mechaniczne oraz mikrostrukturę AbstractRapid solidification is a relatively new and effective way of producing ultrafine-grained UFG aluminum alloys with enhanced mechanical properties. Due to a significant cooling rate close to nearly 10 6 K/s, it is possible to obtain a material with grain size far below 100 nm. In the present study, RS aluminum alloys with an Si content in a range of 5-10 wt% were produced during melt spinning. As a result, materials in the form of ribbons were produced. The as-received flakes were subjected to cold pressing into cylindrical billets with a diameter of 40 mm. Hot extrusion of pre-compacted material was subsequently performed at a temperature of 450°C with a press ram speed of 3 mm/s and extrusion ratio of λ = 25. In this work, the influence of brittle phases on the mechanical properties of as-extruded rods will be examined. Both tensile and microhardness tests were performed in order to determine the mechanical properties of the obtained profiles. It has been shown that brittle-phase refinement during melt spinning significantly influences the mechanical properties of the tested materials.

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“…The hot spinning process produces a high density of dislocations which are high stored energy zones around coarse eutectic Si particles. These energy zones with high stored energy supply preferred recrystallization nucleation sites and hence recrystallization occures [23][24][25] . …”

Section: Microstructural Evolution During Hot Spinning Processmentioning

confidence: 99%

Evolution of microstructure and mechanical properties of A356 aluminium alloy processed by hot spinning process

Zhang

Chen

et al. 2017

China Foundry

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T he increasing demand for weight reduction in the automotive industry has resulted in a large research interest in aluminum alloys currently. A356 aluminum alloy is a kind of desired and commonly used material in the automotive field, such as suspension components and automotive wheels [1][2][3][4][5][6][7] . However, A356 products manufactured by casting process generally consist of primary dendrite with non-uniform solute distribution and defects, such as Fe-rich phases and porosities, which may lead to the reduction of service life [8] . Plastic deformation process is definitely an alternative to ameliorate some of the above negative aspects of cast alloys [9,10] . Casting-spinning technique is a kind of incremental forming technique employed on circular or tubular cast workpieces [11] . During the spinning process, a large amount of plastic deformation occurred. In recent years, the casting-spinning technique has been used in manufacturing automobile hubs. It has been validated that the application of this process is powerful to fulfill Abstract: The evolution of microstructure and mechanical properties of A356 aluminum alloy subjected to hot spinning process has been investigated. The results indicated that the deformation process homogenized microstructure and improved mechanical properties of the A356 aluminum alloy. During the hot spinning process, eutectic Si particles and Fe-rich phases were fragmented, and porosities were eliminated. In addition, recrystallization of Al matrix and precipitation of AlSiTi phases occurred. The mechanical property testing results indicated that there was a significant increase of ductility and a decrease of average microhardness in deformed alloy over die-cast alloy. This is attributed to uniform distribution of finer spherical eutectic Si particles, the elimination of casting defects and to the recrystallized finer grain structure.

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Contribution of microstructural parameters to strengthening in an ultrafine-grained Al–7% Si alloy processed by severe deformation

Cited by 160 publications

References 33 publications

Evolution of Mechanical Twinning during Cyclic Deformation of Mg-Zn-Ca Alloys

Evolution of Mechanical Twinning during Cyclic Deformation of Mg-Zn-Ca Alloys

SELECTION OF OPTIMAL CONDITIONS FOR SOLID BONDING OF THE AlSi11 ALUMINIUM ALLOY

Evolution of microstructure and mechanical properties of A356 aluminium alloy processed by hot spinning process

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