A tri-modal aluminum based composite with super-high strength

Ye, Jichun; Han, Bing; Lee, Zonghoon; Ahn, Byungmin; Nutt, Steve; Schoenung, Julie M.

doi:10.1016/j.scriptamat.2005.05.004

Cited by 202 publications

(112 citation statements)

References 13 publications

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“…Further work is warranted to optimize bimodal microstructures for mechanical performance and to extend the approach to different multiscale alloys. [16] Dynamic straining experiments employing in-situ observation techniques should provide further insights into deformation and fracture mechanisms of bimodal materials.…”

Section: Discussionmentioning

confidence: 99%

Tensile Deformation and Fracture Mechanism of Bulk Bimodal Ultrafine-Grained Al-Mg Alloy

Lee

Radmilović

Ahn

et al. 2009

Metall Mater Trans A

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111

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The tensile fractures of ultrafine-grained (UFG) Al-Mg alloy with a bimodal grain size were investigated at the micro-and macroscale using transmission electron microscopy (TEM), scanning electron microscopy (SEM) equipped with focused ion beam (FIB), and optical microscopy. The nanoscale voids and crack behaviors near the tensile fracture surfaces were revealed in various scale ranges and provided the evidence to determine the underlying tensile deformation and fracture mechanisms associated with the bulk bimodal metals. The bimodal grain structures exhibit unusual deformation and fracture mechanisms similar to ductile-phase toughening of brittle materials. The ductile coarse grains in the UFG matrix effectively impede propagation of microcracks, resulting in enhanced ductility and toughness while retaining high strength. In view of the observations collected, we propose a descriptive model for tensile deformation and fracture of bimodal UFG metals.

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Section: Discussionmentioning

confidence: 99%

Tensile Deformation and Fracture Mechanism of Bulk Bimodal Ultrafine-Grained Al-Mg Alloy

Lee

Radmilović

Ahn

et al. 2009

Metall Mater Trans A

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111

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“…The density of the consolidated samples was found to be 0.99, 0.96, and 1.03 of theoretical density (2.65 g/ cm 3 ), for Samples 1, 2, and 3, respectively, using the Archimedes method. The higher than theoretical density of Sample 3 is due to the uptake of oxygen and nitrogen during cryomilling (see Table I).…”

Section: Resultsmentioning

confidence: 90%

“…The reinforcement particle's contribution to strengthening via load transfer is estimated by the rule-of-mixtures as [3] Dr…”

Section: ½7mentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11] In a drive to further enhance the properties of MMCs, recent research has focused on reducing the reinforcement particle size from the micrometric regime to submicron and nanometric length scales. [6,9] The strength and hardness of nanoparticle-reinforced composites have been extensively studied and the operative strengthening mechanisms have been thoroughly described [6,9,12,13] with the general finding that as the reinforcement particle size decreases, the strength of the composite increases.…”

Section: Introductionmentioning

confidence: 99%

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Reinforcement Size Dependence of Load Bearing Capacity in Ultrafine-Grained Metal Matrix Composites

Yang

Balog

Krížik

et al. 2017

Metall Mater Trans A

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The length-scale effects on the load bearing capacity of reinforcement particles in an ultrafine-grained metal matrix composite (MMC) were studied, paying particular attention to the nanoscale effects. We observed that the nanoparticles provide the MMCs with a higher strength but a lower stiffness compared to equivalent materials reinforced with submicron particles. The reduction in stiffness is attributed to ineffective load transfer of the local stresses to the small and equiaxed nanoparticles.

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“…Some research works [7][8][9] show that reinforcements such as SiC particles can be successfully incorporated into aluminum matrix using MA technique. The property of composites was improved by the uniform distribution of reinforcement and the refinement of sub-grain size.…”

Section: Introductionmentioning

confidence: 99%

Production of Boron Carbide Reinforced 2024 Aluminum Matrix Composites by Mechanical Alloying

Nie

Liu

et al. 2007

Mater. Trans.

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Boron carbide particulates reinforced 2024 Aluminum matrix composites were fabricated by mechanical alloying-hot extrusion technology successfully. The morphology and microstructure of B 4 C p /2024Al composite were investigated by optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A clean interface of B 4 C between aluminum was obtained in this experiment, and matrix alloy revealed the typical microstructure of high energy milling with average grain size about 300 nm. Nanosized oxide and carbide formed after the composites subjected to high energy milling and hot consolidation process. The yield strength and Young's modulus values were improved significantly over the monolithic 2024 alloy.

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A tri-modal aluminum based composite with super-high strength

Cited by 202 publications

References 13 publications

Tensile Deformation and Fracture Mechanism of Bulk Bimodal Ultrafine-Grained Al-Mg Alloy

Tensile Deformation and Fracture Mechanism of Bulk Bimodal Ultrafine-Grained Al-Mg Alloy

Reinforcement Size Dependence of Load Bearing Capacity in Ultrafine-Grained Metal Matrix Composites

Production of Boron Carbide Reinforced 2024 Aluminum Matrix Composites by Mechanical Alloying

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