Al-Cu layered composites fabricated by deformation

Korznikova, G. F.; Mulyukov, R. R.; Zhilyaev, Alexander P.; Даниленко, В. Н.; Khisamov, R. Kh.; Nazarov, K. S.; Sergeyev, S. N.; Khalikova, G. R.; Kabirov, R. R.

doi:10.1063/1.5084389

Cited by 5 publications

(1 citation statement)

References 11 publications

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“…Согласно серии ранних работ [8,13] Согласно [14], повышение скорости деформации при ИПДК приводит к росту доли вовлеченных в деформацию систем скольжения в материале. Это способствует, например, формированию равноосных нанокристаллических зерен γ-фазы в аустенитной нержавеющей стали, в результате протекания деформационно-индуцированного как прямого (γ → α'), так и обратного (α' → γ) превращений, в то время как при малых скоростях деформации имеет место формирование удлиненных субзерен α-фазы только за счет действия прямого деформационно-индуцированного превращения [15].…”

Section: результаты и их обсуждениеunclassified

On the possibility of applying severe plastic deformation by high pressure torsion for the manufacture of Al-Nb metal matrix composites

et al. 2020

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The article discusses the possibility of fabrication an aluminium based matrix composite of the Al-Nb hybrid system using severe plastic deformation by high pressure torsion (HPT). Disks of aluminum (with diameters from 6 to 12 mm) and niobium (12 mm in diameter), were stacked in the form of a three-layer Al-Nb-Al package, and subjected to deformation. HPT was carried out at room temperature on Bridgman anvils under a pressure of 5 GPa at N =10, 25 and 30 revolutions, at a strain rate of ω =1 and 2 rpm. Regardless of the choice of the aluminum disk diameter and the deformation modes, monolithic and defect-free samples were fabricated. However, the most effective fragmentation and distribution of niobium in the aluminum matrix was observed when a diameter of aluminum discs was 10 mm and deformation modes N = 25 and 30 revolutions and ω = 2 rpm were applied. Three structural areas were found in the processed samples: the central one with wide curved layers of niobium in aluminum, a finely dispersed lamellar structure in the mid radius area, and a uniform distribution of niobium particles in aluminum matrix at the periphery. The observed heterogeneity of the structure in the samples correlated well with changes in microhardness, the values of which varied nonmonotonically: the minimum level (about 100 HV) was observed in the center, the maximum values (about 280 and 300 HV) in the middle of the radius and about 130 HV at the periphery of the sample, for N = 25 and 30 revolutions, respectively. In addition, it was shown by X-ray diffraction methods that at a higher strain rate and N = 25 and 30, strain-induced aging occurred in the composite material with the synthesis of the hardening intermetallic phase Al 3 Nb, the volume fraction of which increased from 2.8 to 3.1 % with increasing number of revolutions.

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Section: результаты и их обсуждениеunclassified

On the possibility of applying severe plastic deformation by high pressure torsion for the manufacture of Al-Nb metal matrix composites

et al. 2020

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Using high-pressure torsion to fabricate an Al–Ti hybrid system with exceptional mechanical properties

Bartkowska

Bazarnik

Huang

et al. 2021

Materials Science and Engineering: A

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Molecular dynamics simulation of structural transformations in Cu-Al system under pressure

Polyakova

Nazarov

Khisamov

et al. 2020

J. Phys.: Conf. Ser.

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Aluminium-copper (Al–Cu) compounds are one of the most-studied precipitation-strengthened alloy systems. Mechanical properties of Cu-Al systems considerably dependent on the phase composition. Excellent properties primarily depend on the intrinsic microstructures formed during processing stages, particularly the precipitated phases or the so-called intermetallics, along with various defects and impurity segregation, have important influences on the composite strength. Study of fabrication techniques to obtain composites with improved mechanical properties, careful investigation of phase composition, dynamics and kinetics are of high importance. Molecular dynamics simulation is used to study on the atomistic level the process of formation of Al/Cu composite from two initially separated crystals by severe plastic deformation. The proposed model is the simplification of scenario, experimentally observed previously. However, even in such a simple model, understanding of the mechanisms underlying in the process of composite formation can be obtained.

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Al-Cu layered composites fabricated by deformation

Cited by 5 publications

References 11 publications

On the possibility of applying severe plastic deformation by high pressure torsion for the manufacture of Al-Nb metal matrix composites

On the possibility of applying severe plastic deformation by high pressure torsion for the manufacture of Al-Nb metal matrix composites

Using high-pressure torsion to fabricate an Al–Ti hybrid system with exceptional mechanical properties

Molecular dynamics simulation of structural transformations in Cu-Al system under pressure

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