Consideration of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites: A model for predicting their yield strength

Zhang, Z.; Chen, D.L.

doi:10.1016/j.scriptamat.2005.12.017

Cited by 1,138 publications

(393 citation statements)

References 26 publications

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“…While the Orowan strengthening effect might be small in the micro-sized particulate-reinforced composites, it played an important role in the nano-sized particulatereinforced composites [2]. The prediction based on the proposed model was found to be in good agreement with the experimental data [1,2]. The aim of the present investigation was to explore the possibility of extending the proposed model to predict the fracture strength of ceramic matrix nanocomposites (CMNCs).…”

Section: Introductionmentioning

confidence: 94%

“…A model for predicting the yield strength of particulatereinforced metal matrix nanocomposites (MMNCs) has recently been developed, on the basis of the load-bearing effect, the enhanced dislocation density due to the residual plastic strain caused by the difference in the coefficients of thermal expansion between the matrix and particles, and Orowan strengthening effect [1]. The equation can be expressed as follows:…”

Section: Introductionmentioning

confidence: 99%

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Prediction of fracture strength in Al₂O₃/SiC_pceramic matrix nanocomposites

Zhang

Chen²

2007

Science and Technology of Advanced Materials

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Based primarily on a recent publication [S.M. Choi, H. Awaji, Sci. Tech. Adv. Mater. 6 (2005) 2-10.], where the dislocations around the nano-sized particles in the intra-granular type of ceramic matrix nanocomposites (CMNCs) were modeled, dislocation activities in Al 2 O 3 /SiC p CMNCs were discussed in relation to the processing conditions. The dislocations around the nano-sized particles, caused by the thermal mismatch between the ceramic matrix and nano-sized particles, were assumed to hold out the effect of Orowan-like strengthening, although the conventional Owowan loops induced by the movement of dislocations were unlikely in the ceramic matrix at room temperature. A model involving the yield strength of metal matrix nanocomposites (MMNCs), where the Owowan strengthening effect was taken into consideration, was thus modified and extended to predict the fracture strength of the intra-granular type of CMNCs without and with annealing. On the basis of the characteristics of dislocations in the CMNCs, the load-bearing effect and Orowan-like strengthening were considered before annealing, while the load-bearing effect and enhanced dislocation density strengthening were taken into account after annealing. The model prediction was found to be in agreement with the experimental data of Al 2 O 3 /SiC p nanocomposites reported in the literature. r

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Prediction of fracture strength in Al₂O₃/SiC_pceramic matrix nanocomposites

Zhang

Chen²

2007

Science and Technology of Advanced Materials

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“…Согласно представлениям теории дисперсного упрочнения наночастицами наибольший эффект создается при следующих условиях: содержании упрочняющей фазы 3-15 об.%, размере частиц 10-50 нм и среднем расстоянии между ними 0,1-0,5 мкм. В работе [17] рассмотрены 3 основных упрочняющих фактора при введении твердых на ночастиц в объем металлических сплавов:…”

Section: № 2 2014unclassified

Peculiarities of Nano Modification Influence on Properties of Bond Cu-Fe-Co-Ni for Diamond Tool.

Логинов¹,

Курбаткина²,

Левашов³

et al. 2015

Izv. vuzov, Porošk. metall. funkc. pokryt.

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“…[5,7] These enhancements in the mechanical properties by nanoparticles are associated with the obstruction of dislocation movement and also the promotion of fine grain sizes. [8][9][10] Also, it is crucial to achieve a uniform distribution of nanoparticles through the matrix and good bonding between the matrix and nanoparticles in order to maximize composite mechanical properties. [11][12][13] Although there are a number of available fabrication routes for MMNCs, an ultrasonic method, [5,14] which combines casting with ultrasonic cavitation-based dispersion of nanoparticles in molten alloys, seems an economical and promising route in terms of producing engineering components with complex shapes.…”

Section: Metal Matrix Nanocomposites (Mmncs)mentioning

confidence: 99%

Thixoforming of A356/SiC and A356/TiB2 Nanocomposites Fabricated by a Combination of Green Compact Nanoparticle Incorporation and Ultrasonic Treatment of the Melted Compact

Kandemir

Atkinson

Weston

et al. 2014

Metall Mater Trans A

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Thixoforming is a type of semi-solid processing which is based on forming metals in the semisolid state rather than fully liquid or solid state. There have been no reports of the thixoforming of nanocomposites in the literature. The incorporation of ceramic nanoparticles into liquid metals is a challenging task for the fabrication of metal matrix nanocomposites due to their large surface-to-volume ratio and poor wettability. Previous research work by a number of workers has highlighted the challenges with the incorporation of nanoparticles into liquid aluminum alloy. In the present study, SiC and TiB 2 nanoparticles with an average diameter between 20 and 30 nm were firstly incorporated into green compacts by a powder forming route, and then the compacts were melted and treated ultrasonically. The microstructural studies reveal that the engulfment and relatively effective distribution of the nanoparticles into the melt were achieved. The hardness was considerably improved with only 0.8 wt pct addition of the nanoparticles. The nanocomposites were successfully thixoformed at a solid fraction between 0.65 and 0.70. The microstructures, hardness, and tensile mechanical properties of the thixoformed nanocomposites were investigated and compared with those of the as-received A356 and thixoformed A356 alloys. The tensile properties of the thixoformed nanocomposites were significantly enhanced compared to thixoformed A356 alloy without reinforcement, indicating the strengthening effects of the nanoparticles.

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Consideration of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites: A model for predicting their yield strength

Cited by 1,138 publications

References 26 publications

Prediction of fracture strength in Al₂O₃/SiC_pceramic matrix nanocomposites

Prediction of fracture strength in Al₂O₃/SiC_pceramic matrix nanocomposites

Peculiarities of Nano Modification Influence on Properties of Bond Cu-Fe-Co-Ni for Diamond Tool.

Thixoforming of A356/SiC and A356/TiB2 Nanocomposites Fabricated by a Combination of Green Compact Nanoparticle Incorporation and Ultrasonic Treatment of the Melted Compact

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Consideration of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites: A model for predicting their yield strength

Cited by 1,138 publications

References 26 publications

Prediction of fracture strength in Al2O3/SiCpceramic matrix nanocomposites

Prediction of fracture strength in Al2O3/SiCpceramic matrix nanocomposites

Peculiarities of Nano Modification Influence on Properties of Bond Cu-Fe-Co-Ni for Diamond Tool.

Thixoforming of A356/SiC and A356/TiB2 Nanocomposites Fabricated by a Combination of Green Compact Nanoparticle Incorporation and Ultrasonic Treatment of the Melted Compact

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Prediction of fracture strength in Al₂O₃/SiC_pceramic matrix nanocomposites

Prediction of fracture strength in Al₂O₃/SiC_pceramic matrix nanocomposites