Equal channel angular pressing of metal matrix composites: Effect on particle distribution and fracture toughness

Sabirov, I.; Kolednik, O.; Valiev, Ruslan Z.; Pippan, Reinhard

doi:10.1016/j.actamat.2005.07.010

Cited by 153 publications

(69 citation statements)

References 30 publications

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“…In contrast, in a study of ECAP of an Al 6061-20% Al 2 O 3 by route B C at 370 • C, Sabirov et al [13] showed that the processing resulted in a more homogeneous microstructure by reinforcement redistribution in the Al matrix. Other studies [14] also indicate that high-temperature ECAP processing is necessary in order to homogenize particulate-reinforced Al microstructures.…”

Section: Strain Path Dependence Of Microstructure Evolutionmentioning

confidence: 92%

Microstructural development during equal channel angular pressing of hypo-eutectic Al–Si casting alloy by different processing routes

García-Infanta

Zhilyaev

Carreño

et al. 2008

Materials Science and Engineering: A

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Section: Strain Path Dependence Of Microstructure Evolutionmentioning

confidence: 92%

Microstructural development during equal channel angular pressing of hypo-eutectic Al–Si casting alloy by different processing routes

García-Infanta

Zhilyaev

Carreño

et al. 2008

Materials Science and Engineering: A

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“…Several mechanical processes including compressing, rolling, extrusion, forging, equal channel angular pressing (ECAP) and accumulative roll bonding (ARB) have been applied to as-cast AMMCs and it has been shown that they can improve the mechanical properties of the AMMCs. The observed improvement in ductility and strength is attributed to associated (a) decrease in porosity content, (b) better interfacial bonding between particle and matrix, (c) separation of agglomerated particles, and (d) refinement of the matrix structure [5,[29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 98%

Mechanical properties of rolled A356 based composites reinforced by Cu-coated bimodal ceramic particles

et al. 2015

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ab s t r a c tThree kinds of A356 based composites reinforced with 3 wt.% Al2O3 (average particle size: 170 lm), 3 wt.% SiC (average particle size: 15 lm), and 3 wt.% of mixed Al2O3-SiC powders (a novel composite with equal weights of reinforcement) were fabricated in this study via a two-step approach. This first process step was semi-solid stir casting, which was followed by rolling as the second process step. Electroless deposition of a copper coating onto the reinforcement was used to improve the wettability of the ceramic particles by the molten A356 alloy. From microstructural characterization, it was found that coarse alumina particles were most effective as obstacles for grain growth during solidification. The rolling process broke the otherwise present fine silicon platelets, which were mostly present around the Al2O3 particles. The rolling process was also found to cause fracture of silicon particles, improve the distribution of fine SiC particles, and eliminate porosity remaining after the first casting process step. Examination of the mechanical properties of the obtained composites revealed that samples which contained a bimodal ceramic reinforecment of fine SiC and coarse Al2O3 particles had the highest

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“…Equal-channel angular pressing (ECAP) of AMCs also in principle offers the possibility of strain-hardening and induces an ultrafine-grained microstructure [3,4]. Most relevant publications on ECAP, however, report on pure metals or their alloys [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of ECAP temperature on the formability of a particle reinforced 2017 aluminum alloy

Wagner

Härtel

Frint

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Enhanced room temperature formability of magnesium alloy sheets by suppression of basal texture formation Yasumasa Chino -Development of ultrafine-grained microstructure in Al-Cu-Mg alloy through equal-channel angular pressing Danam Sai Anuhya, Ashutosh Gupta, Niraj Nayan et al. Abstract. Severe plastic deformation methods are commonly used to increase the strength of materials by generating ultrafine-grained microstructures. The application of these methods to Al-Cu alloys is, however, difficult because of their poor formability at room temperature. An additional reduction of formability of such alloys occurs when ceramic particles are added as reinforcement: this often triggers shear localization and crack initiation during ECAP. This is the main reason why equal-channel angular pressing (ECAP) of aluminum matrix composites (AMCs) can generally only be performed at elevated temperatures and using ECAP dies with a channel angle larger than 90° (e.g. 120°). In this study we present a brief first report on an alternative approach for the improvement of the formability of an AMC (AA2017, 10 % SiC): ECAP at low temperatures. We show that, using a temperature of -60 °C and a channel angle of 90° (corresponding to an equivalent strain of 1.1), ECAP of the AMC can be successfully performed without material failure. The mechanical properties of the strongly deformed AMC are analyzed by tensile testing. Our results indicate that the increased formability of the AMC at low temperatures can be attributed to the suppression of unstable plastic flow that affects formability at room temperature.

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Equal channel angular pressing of metal matrix composites: Effect on particle distribution and fracture toughness

Cited by 153 publications

References 30 publications

Microstructural development during equal channel angular pressing of hypo-eutectic Al–Si casting alloy by different processing routes

Microstructural development during equal channel angular pressing of hypo-eutectic Al–Si casting alloy by different processing routes

Mechanical properties of rolled A356 based composites reinforced by Cu-coated bimodal ceramic particles

Influence of ECAP temperature on the formability of a particle reinforced 2017 aluminum alloy

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