Enhanced properties of Mg-based nano-composites reinforced with Al2O3 nano-particles

Habibnejad-korayem, Mahdi; Mahmudi, R.; Poole, Warren J.

doi:10.1016/j.msea.2009.05.001

Cited by 340 publications

(165 citation statements)

References 20 publications

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“…It has been shown that the addition of a small amount of fine ceramic particles improves the strength significantly [7,8]. Al 2 O 3 particles with high specific stiffness and superior high temperature properties are used as inert ceramic reinforcement phases in MMCs [9,10]. A large number of studies have been performed on the fabrication and characterization of nano-sized Al 2 O 3 -reinforced Al matrix composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites

Jia

Gokuldoss

et al. 2017

Metals

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Al 2 O 3 nanoparticle-reinforced Al-12Si matrix composites were successfully fabricated by hot pressing and subsequent hot extrusion. The influence of weight fraction of Al 2 O 3 particles on the microstructure, mechanical properties, and the corresponding strengthening mechanisms were investigated in detail. The Al 2 O 3 particles are uniformly distributed in the matrix, when 2 and 5 wt. % of Al 2 O 3 particles were added to the Al-12Si matrix. Significant agglomeration can be found in composites with 10 wt. % addition of Al 2 O 3 nanoparticles. The maximum hardness, the yield strength, and tensile strength were obtained for the composite with 5 wt. % Al 2 O 3 addition, which showed an increase of about~11%, 23%, and 26%, respectively, compared with the Al-12Si matrix. Meanwhile, the elongation increased to about~30%. The contribution of different mechanisms including Orowan strengthening, thermal mismatch strengthening, and load transfer strengthening were analyzed. It was shown that the thermal mismatch strengthening has a more significant contribution to strengthening these composites than the Orowan and load transfer strengthening mechanisms.

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Section: Introductionmentioning

confidence: 99%

Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites

Jia

Gokuldoss

et al. 2017

Metals

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“…For AZ91D nano-composites with 2.7 % weight percentage of TiB 2 with a mean diameter of 25 nanometers, the yield strength, ultimate tensile strength and plasticity were improved by 21 %, 16 %, and 48 %, respectively. 8 M. Habibnejad et al 9 studied producing pure magnesium and AZ31 magnesium alloy composites using Al 2 O 3 nano-particles by the stir-casting method. Characterization of the mechanical properties indicated that the yield strength and the tensile strength of pure magnesium and the AZ31 alloy is generally increased with nano-particles; however, the flexibility decreases.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of an in-situ magnesium-based cast nano composite via nano-SiO2 additions to the melt

Borouni¹,

Niroumand²,

Maleki³

2017

Mater. Tehnol.

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In this study, AZ91C magnesium matrix in-situ nano-composites reinforced with oxide particles were produced by the addition of 2 % of mass fractions of silica nanoparticles to the melt using the stir-casting method. For this purpose, nano-silica powder was mixed in molten AZ91C by a special procedure and stirred for 15 min at 750°C and cast in a preheated die at 720°C. Control samples were also cast under the same conditions. Improved microstructure, reduced porosity and increased hardness, tensile strength and yield strength of the composite sample were revealed by microstructural and mechanical investigations. The hardness, yield strength and tensile strength values increased from 65 BHN, 82 MPa and 165 MPa for the monolithic samples to 77 BHN, 97 MPa and 175 MPa for the in-situ formed cast composites. Microstructural and EDS analyses suggested the in-situ formation of Al2O3, MgAl2O4 and MgO oxide particles by in-situ reaction of the Al, Mg and SiO2 in the melt. Keywords: AZ91C alloy, in-situ cast nano-composite, silica nanoparticles, mechanical properties V {tudiji so bili izdelani AZ91C nanokompoziti in situ, na podlagi magnezijeve matrike in oja~ani z oksidnimi delci z dodatkom 2 % nanodelcev silicija za topljenje, z uporabo metode litja z me{anjem. Za ta namen je bil nanosilicijev prah zme{an v raztopljen AZ91C s posebno metodo in nato 15 min me{an na 750°C in lit v predogretem modelu na 720°C. Preizku{anci so bili ravnotako liti v enakih pogojih. Izbolj{ana mikrostruktura, zmanj{ana poroznost in pove~ana trdota, napetostna trdnost in napetost vzorcev kompozita so bili odkriti s preiskavami mikrostrukture in z mehanskimi preiskavami. Vrednosti trdote, napetosti te~enja in natezne napetosti so se pove~ali iz 65 BHN, 82 Mpa in 165 MPa in za monolitne vzorce na 77 BHN, 97 MPa in 175 MPa za in situ formirane lite kompozite. Mikrostrukture in EDS-analize so predlagale in situ formacijo Al2O3, MgAl2O4 in MgO oksidne delce z in situ reakcijo Al, Mg in SiO2 v topljenem. Klju~ne besede: AZ91C zlitina, in situ litje nanokompozitov, nanodelci silicija, mehanske lastnosti

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“…This finding has in recent years provided the much needed impetus for reinforcing selected few magnesium alloys with hard, brittle and essentially elastically deforming particulates of either a ceramic or metallic phase with the underlying objective of improving mechanical properties to include cyclic fatigue resistance of the matrix alloy [8][9][10][11][12][13][14][15][16]. Over the years, few of the reinforcements that have been tried, studied and whose results have been documented in the "open" literature are silicon carbide [4], particulates of copper [5], titanium carbide [17], and even aluminum oxide [18]. Of the reinforcements that have been tried and successfully used fine particulates of alumina or aluminum oxide (Al 2 O 3 ) have engineered both attention and interest among researchers in the pursuit of developing magnesium-based composites [18].…”

Section: Introductionmentioning

confidence: 99%

“…Over the years, few of the reinforcements that have been tried, studied and whose results have been documented in the "open" literature are silicon carbide [4], particulates of copper [5], titanium carbide [17], and even aluminum oxide [18]. Of the reinforcements that have been tried and successfully used fine particulates of alumina or aluminum oxide (Al 2 O 3 ) have engineered both attention and interest among researchers in the pursuit of developing magnesium-based composites [18]. It has also been reported in the published literature that use of nano-sized reinforcements in a magnesium alloy metal matrix promises to exert a beneficial influence on ductility when compared one-on-one with the use of micron-size reinforcements [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…This innovative finding in conjunction with processing-related advancements has provided the much needed incentive for the use of a hybrid reinforcement mixture, i.e., essentially a combination of ceramic and metal, for the magnesium alloy metal matrix so as to complement well with the properties of the reinforcements used. It was felt that the use of a hybrid mixture of reinforcements would help in achieving properties of the material that could not be easily obtained by exclusively using one reinforcement to the metal matrix [11,16,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Nickel Particle Reinforcement on Cyclic Fatigue and Final Fracture Behavior of a Magnesium Alloy Composite

Srivatsan

Manigandan

Godbole

et al. 2012

Metals

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Abstract:The microstructure, tensile properties, cyclic stress amplitude fatigue response and final fracture behavior of a magnesium alloy, denoted as AZ31, discontinuously reinforced with nano-particulates of aluminum oxide and micron size nickel particles is presented and discussed. The tensile properties, high cycle fatigue and final fracture behavior of the discontinuously reinforced magnesium alloy are compared with the unreinforced counterpart (AZ31). The elastic modulus and yield strength of the dual particle reinforced magnesium alloy is marginally higher than of the unreinforced counterpart. However, the tensile strength of the composite is lower than the monolithic counterpart. The ductility quantified by elongation to failure over 0.5 inch (12.7 mm) gage length of the test specimen showed minimal difference while the reduction in specimen cross-section area of the composite is higher than that of the monolithic counterpart. At the microscopic level, cyclic fatigue fractures of both the composite and the monolithic alloy clearly revealed features indicative of the occurrence of locally ductile and brittle mechanisms. Over the range of maximum stress and at two different load ratios the cyclic fatigue resistance of the magnesium alloy composite is superior to the monolithic counterpart. The mechanisms responsible for improved cyclic fatigue life and resultant fracture behavior of the composite microstructure are highlighted.

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Enhanced properties of Mg-based nano-composites reinforced with Al2O3 nano-particles

Cited by 340 publications

References 20 publications

Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites

Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites

Synthesis and characterization of an in-situ magnesium-based cast nano composite via nano-SiO2 additions to the melt

Influence of Nickel Particle Reinforcement on Cyclic Fatigue and Final Fracture Behavior of a Magnesium Alloy Composite

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