Application of forward extrusion-equal channel angular pressing (FE-ECAP) in fabrication of aluminum metal matrix composites

Mani, Behtash

doi:10.1016/j.jallcom.2009.11.098

Cited by 38 publications

(20 citation statements)

References 20 publications

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“…Compared to conventional aluminum alloys, aluminum matrix composites (AMCs) combine advanced mechanical properties, such as high specific strength or high wear resistance, with enhanced creep resistance and thermal stability [1,2]. Equal-channel angular pressing (ECAP) of AMCs also in principle offers the possibility of strain-hardening and induces an ultrafine-grained microstructure [3,4].…”

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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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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“…Reinforcement with ceramic particles provides high strength and stiffness, and enhances wear resistance, thermal stability, and creep resistance [1,2]. It has been shown that methods of severe plastic deformation (SPD) can help to homogenize the particle distribution [3], which improves the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Particulate Reinforcement and Equal-Channel Angular Pressing on Fatigue Crack Growth of an Aluminum Alloy

Köhler

Hockauf²,

Lampke³

et al. 2015

Metals

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Abstract:The fatigue crack growth behavior of unreinforced and particulate reinforced Al 2017 alloy, manufactured by powder metallurgy and additional equal-channel angular pressing (ECAP), is investigated. The reinforcement was done with 5 vol % Al2O3 particles with a size fraction of 0.2-2 µm. Our study presents the characterization of these materials by electron microscopy, tensile testing, and fatigue crack growth measurements. Whereas particulate reinforcement leads to a drastic decrease of the grain size, the influence of ECAP processing on the grain size is minor. Both reinforced conditions, with and without additional ECAP processing, exhibit reduced fatigue crack growth thresholds as compared to the matrix material. These results can be ascribed to the well-known effect of the grain size on the crack growth, since crack deflection and closure are directly affected. Despite their small grain size, the thresholds of both reinforced conditions depend strongly on the load ratio: tests at high load ratios reduce the fatigue threshold significantly. It is suggested that the strength of the particle-matrix-interface becomes the critical factor here and that the particle fracture at the interfaces dominates the failure behavior.

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“…There are several ways for distributing ceramic reinforcement particles in a metal matrix homogeneously. One of the newest and mostly used methods is the application of secondary forming processes; such as rolling [14], forward extrusion-equal channel angular pressing (FE-ECAP) [15], extrusion, and semi-solid extrusion [16]. Among these methods, extrusion has found wide acceptance due to the following advantageous: (1) simplicity, (2) more homogenous reinforcement distribution in the matrix, (3) high productivity with low cost, (4) break up of agglomerated reinforcement, and (5) improvement of mechanical properties and microstructure [16].…”

Section: Introductionmentioning

confidence: 99%

Deformation rate effect on the microstructure and mechanical properties of Al–SiCp composites consolidated by hot extrusion

Jahedi

Mani

Shakoorian

et al. 2012

Materials Science and Engineering: A

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Application of forward extrusion-equal channel angular pressing (FE-ECAP) in fabrication of aluminum metal matrix composites

Cited by 38 publications

References 20 publications

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

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

Influence of Particulate Reinforcement and Equal-Channel Angular Pressing on Fatigue Crack Growth of an Aluminum Alloy

Deformation rate effect on the microstructure and mechanical properties of Al–SiCp composites consolidated by hot extrusion

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