Deformation behaviour of an AS21 alloy reinforced by short Saffil fibres and SiC particles

Trojanová, Zuzanka; Száraz, Zoltán; Lábár, János L.; Lukáč, P.

doi:10.1016/j.jmatprotec.2005.02.188

Cited by 17 publications

(12 citation statements)

References 13 publications

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“…This limit can only be overcome through reinforcing magnesium alloys with particles or fibres, similar to metal matrix composites (MMCs). Use of microscale reinforcements significantly improves the strength [11,12], wear [13], creep resistance [14][15][16], and fatigue strength [17,18]. However, these improvements require the addition of 10-40% of reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound Assisted Casting of an AM60 Based Metal Matrix Nanocomposite, Its Properties, and Recyclability

Dieringa

Katsarou

Buzolin

et al. 2017

Metals

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An AM60 magnesium alloy nanocomposite reinforced with 1 wt % of AlN nanoparticles was prepared using an ultrasound (US) assisted permanent-mould indirect-chill casting process. Ultrasonically generated cavitation and acoustic streaming promoted de-agglomeration of particle clusters and distributed the particles throughout the melt. Significant grain refinement due to nucleation on the AlN nanoparticles was accompanied by an exceptional improvement in properties: yield strength increased by 103%, ultimate tensile strength by 115%, and ductility by 140%.Although good grain refinement was observed, the large nucleation undercooling of 14 K limits further refinement because nucleation is prevented by the formation of a nucleation-free zone around each grain. To assess the industrial applicability and recyclability of the nanocomposite material in various casting processes, tests were performed to determine the effect of remelting on the microstructure. With each remelting, a small percentage of effective AlN nanoparticles was lost, and some grain growth was observed. However, even after the third remelting, excellent strength and ductility was retained. According to strengthening models, enhanced yield strength is mainly attributed to Hall-Petch strengthening caused by the refined grain size. A small additional contribution to strengthening is attributed to Orowan strengthening.

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Section: Introductionmentioning

confidence: 99%

Ultrasound Assisted Casting of an AM60 Based Metal Matrix Nanocomposite, Its Properties, and Recyclability

Dieringa

Katsarou

Buzolin

et al. 2017

Metals

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“…In the case of the parallel orientation, the sample exhibit signicantly higher yield and tensile strength. As it was shown by several authors [7,8], the largest contribution to the strengthening of bers reinforced composites is given by the load transfer from the matrix to the bers. The observed behavior is in agreement with the shear lag model [9], which determines the stress necessary for deformation of a composite due to the load transfer as follows [10]:…”

Section: Resultsmentioning

confidence: 83%

Neutron Diffraction Study and Deformation Behavior of a Composite Based Mg Alloy Reinforced by Short Saffil Fibers

2015

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In the present work neutron diraction has been applied for ex situ investigation of residual stresses in Mg4%Al1%Ca (AX41) magnesium alloy reinforced with short Sal bers. Samples were deformed in compression at room temperature. Two types of ber arrangement were investigated. In both samples the bers were homogeneously distributed and arranged in parallel planes with a random ber orientation. In the rst sample these planes were parallel with the loading axis and in the second one they were perpendicular to the loading direction. Signicant dependence of both the mechanical properties and residual strains on the bers orientation was observed. Sample with parallel ber arrangement showed higher hardness and lower ductility. Further the increment of residual tensile lattice strain in the matrix with a macroscopic deformation is much higher than in the other case. It was found that the residual strain evolution strongly depends on the orientation of grains in the matrix.

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“…Assuming these different strengthening mechanisms act evenly throughout the matrix, the stress increase can be superimposed linearly [11]. By using linear superposition, the yielding stress of Mg-6Al-6Nd alloy can be calculated as 102.8 MPa, which is 9.2 MPa lower than the experimental value of yielding stress (112 MPa).…”

Section: Combination Of Strengthening Termsmentioning

confidence: 94%

“…In Ref. [11], the increase in yielding strength of AS21 alloy reinforced by short Saffil fibers due to Orowan strengthening is calculated as OR p…”

Section: Dispersion Strengtheningmentioning

confidence: 99%

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Microstructure and strengthening mechanisms of Mg-6Al-6Nd alloy

Yan

et al. 2010

Rare Metals

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The microstructure and strengthening mechanisms of as-cast Mg-6Al-6Nd alloy were studied. The results show that the addition of 6 wt.% Nd into Mg-6Al alloy leads to the precipitation of Al 11 Nd 3 and Al 2 Nd phases and decrease in the content of Al solid soluted in Mg-Al matrix. The volume fractions of Al 11 Nd 3 and Al 2 Nd phases are 3.64% and 0.34%, respectively. Compared with Mg-6Al alloy, the ultimate strength, yielding strength, and elongation of Mg-6Al-6Nd alloy at room temperature and 175°C are enhanced in some degrees. The strengthening mechanisms of Mg-6Al-6Nd alloy are mainly composed of solid solution strengthening of Al solid soluted in Mg-Al matrix and grain refinement strengthening, dispersion strengthening, and composite strengthening brought by the precipitation of Al 11 Nd 3 phase. The composite strengthening includes the load transfer from the matrix to Al 11 Nd 3 phase and the enhancement of dislocation density due to the geometrical mismatch and thermal mismatch between the matrix and Al 11 Nd 3 phase.

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Deformation behaviour of an AS21 alloy reinforced by short Saffil fibres and SiC particles

Cited by 17 publications

References 13 publications

Ultrasound Assisted Casting of an AM60 Based Metal Matrix Nanocomposite, Its Properties, and Recyclability

Ultrasound Assisted Casting of an AM60 Based Metal Matrix Nanocomposite, Its Properties, and Recyclability

Neutron Diffraction Study and Deformation Behavior of a Composite Based Mg Alloy Reinforced by Short Saffil Fibers

Microstructure and strengthening mechanisms of Mg-6Al-6Nd alloy

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