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

Jahedi, Mohammad; Mani, Behtash; Shakoorian, Sheida; Pourkhorshid, E; Paydar, Mohammad Hossein

doi:10.1016/j.msea.2012.06.054

Cited by 35 publications

(20 citation statements)

References 30 publications

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“…Such behavior can be explained by the presence of very high hydrostatic stresses. As was shown in [95,96], these high hydrostatic stresses in the entry channel suppress any plastic flow in highly concentrated particle clusters, even at very high levels of plastic strain. In other words, each dense CNT particle cluster behaves like a single hard particle that is "eroded" by the matrix during ECAP.…”

Section: Cnts and Grain Structure As Revealed In Sem And Temmentioning

confidence: 66%

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Zare

Jahedi

Toroghinejad

et al. 2016

Materials Science and Engineering: A

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a b s t r a c tIn this work, 2 vol% carbon nanotubes (CNTs) reinforced aluminum (Al) matrix composites of superior microstructural homogeneity are successfully synthesized using Bc equal-channel angular extrusion (ECAP) route. The key step in arriving at high level of homogeneous distribution of CNTs within Al was preparation of the powder using simultaneous attrition milling and ultra-sonication processes. Microstructure as revealed by electron microscopy and absence of Vickers hardness gradients across the material demonstrate that the material reached the homogeneous state in terms of CNT distribution, porosity distribution, and grain structure after eight ECAP passes. To facilitate comparison of microstructure and hardness, samples of Al were processed under the same ECAP conditions. Significantly, the composite containing only 2 vol% exhibits 20% increase in hardness relative to the Al samples.

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Section: Cnts and Grain Structure As Revealed In Sem And Temmentioning

confidence: 66%

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Zare

Jahedi

Toroghinejad

et al. 2016

Materials Science and Engineering: A

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“…For hot deformation activation energy Q, it can be figured out by the variant form of the equation (2), which is equation (11). , which can be determined to be the value of n and s, respectively.…”

Section: Kinetic Analysis and Constitutive Equationsmentioning

confidence: 99%

“…The proper processing conditions can greatly improve the workability of the materials. However, the addition of the reinforced particles will complicate the hot workability, such as hot extrusion, hot forging, and hot rolling [11,12]. The main reason is that the effect of the particles on the strain hardening and dynamic softening may change the dislocation density and the microstructure transformation.…”

Section: Introductionmentioning

confidence: 99%

Hot deformation behavior of the AA6016 matrix composite reinforced with in situ ZrB₂ and Al₂O₃ nanoparticles

Fang

Zhao

Kai

et al. 2020

Mater. Res. Express

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The hot deformation tests of in situ ZrB 2 and Al 2 O 3 nanoparticles reinforced AA6016 matrix composite were studied at deformation temperature of 300°C-450°C and strain rate of 0.001-1 s −1 . In this paper, the ZrB 2 and Al 2 O 3 nanoparticles were successfully prepared by direct melt reaction method firstly. Based on experimental results, the flow stress increased rapidly with the increasing true strain and decreased with the increasing temperature. Constitutive equation of the composite can be established based on the Arrhenius constitutive model. The processing map based on dynamic material model showed two stable processable domains: Domain A(300-360°C/0.08-0.01 s −1 ), which was controlled by dynamic recovery and domain B(410-430°C/0.37-1 s −1 ), which was typical dynamic recrystallization structure. The microstructural changes of the samples after deformed were observed through optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). It was concluded that these two kinds of reinforced particles can greatly promote recrystallization nucleation at high temperatures. Thus, domain B is optimum hot processing window.

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“…The effect of the ram speed in the hot FE process was investigated by Jahedi et al (70) with respect to the final microstructure and mechanical properties of the Al-SiC p composites. Billets were produced by a PM route, combining commercially pure Al and 5 wt.% b-SiC particulate, respectively, of 50 and 5 mm average size.…”

Section: Extrusionmentioning

confidence: 99%

Forming of Metal Matrix Composites

Ceschini

Morri

Rotundo

2014

Comprehensive Materials Processing

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

Cited by 35 publications

References 30 publications

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Hot deformation behavior of the AA6016 matrix composite reinforced with in situ ZrB₂ and Al₂O₃ nanoparticles

Forming of Metal Matrix Composites

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

Cited by 35 publications

References 30 publications

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Hot deformation behavior of the AA6016 matrix composite reinforced with in situ ZrB2 and Al2O3 nanoparticles

Forming of Metal Matrix Composites

Contact Info

Product

Resources

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Hot deformation behavior of the AA6016 matrix composite reinforced with in situ ZrB₂ and Al₂O₃ nanoparticles