Effect of graphite additives on microstructure and mechanical properties of Al–Cu composites prepared by mechanical alloying and sintering

Matvienko, Ya. I.; Поліщук, С. С.; Rud, A. D.; Popov, Oleksii; Demchenkov, S.А.; Fesenko, Olena

doi:10.1016/j.matchemphys.2020.123437

Cited by 16 publications

(7 citation statements)

References 48 publications

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“…2xxx series aluminum alloys with copper has been widely used in many applications such as aerospace and automotive industries [1][2][3][4][5][6][7]. Due to low weight, high strength and excellent machinability, Al-Cu alloys are important candidates for steel substitution in some applications in the aerospace and automotive industries [8]. Currently, it is imperative to further improve the strength and stiffness of lightweight alloys to develop the next generation of aircraft and vehicles [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Due to low weight, high strength and excellent machinability, Al-Cu alloys are important candidates for steel substitution in some applications in the aerospace and automotive industries [8]. Currently, it is imperative to further improve the strength and stiffness of lightweight alloys to develop the next generation of aircraft and vehicles [8][9][10]. Rare earth elements have been added in aluminum alloys to improve the tensile strength, heat resistance and corrosion resistance [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical Properties of Novel Quasibinary Al-Cu-Yb and Al-Cu-Gd Alloys

Амер

Barkov

Поздняков

2021

Metals

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Microstructure of Al–Cu–Yb and Al-Cu-Gd alloys at casting, hot-rolled -cold-rolled and annealed state were observed; the effect of annealing on the microstructure was studied, as were the mechanical properties and forming properties of the alloys, and the mechanism of action was explored. Analysis of the solidification process showed that the primary Al solidification is followed by the eutectic reaction. The second Al8Cu4Yb and Al8Cu4Gd phases play an important role as recrystallization inhibitor. The Al3Yb or (Al, Cu)17Yb2 phase inclusions are present in the Al-Cu-Yb alloy at the boundary between the eutectic and aluminum dendrites. The recrystallization starting temperature of the alloys is in the range of 250–350 °C after rolling with previous quenching at 590 and 605 °C for Al-Cu-Yb and Al-Cu-Gd, respectively. The hardness and tensile properties of Al-Cu-Yb and Al-Cu-Gd as-rolled alloys are reduced by increasing the annealing temperature and time. The as-rolled alloys have high mechanical properties: YS = 303 MPa, UTS = 327 MPa and El. = 3.2% for Al-Cu-Yb alloy, while YS = 290 MPa, UTS = 315 MPa and El. = 2.1% for Al-Cu-Gd alloy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Novel Quasibinary Al-Cu-Yb and Al-Cu-Gd Alloys

Амер

Barkov

Поздняков

2021

Metals

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“…The final powder produced by MA/MM can be further consolidated by standard powder metallurgy techniques used in the manufacture of bulk materials, or it can be deposited on the surfaces of engineered parts using various thermal spray methods. Some important studies have been carried out to determine the effectiveness of using C as a reinforcing material in the aluminum matrix using mechanical milling [ 17 , 18 , 19 ]. During the sintering treatment, the content of C dispersed in the aluminum matrix is transformed into the phase Al 4 C 3 , that substantially improves the mechanical properties of the compound [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Statistical and Microstructural Analyses of Al–C–Cu Composites Synthesized Using the State Solid Route

et al. 2021

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Aluminum powder with different C and C–Cu mixtures powders were fabricated by powder metallurgy, using high-energy mechanical milling as a pre-treatment of powders. To evaluate the combined effect of the C–Cu mixture and the process conditions, such as sintering temperature/time and milling time, on the yield stress and hardness, two experimental designs were carried out. The results were analyzed with Minitab Statistical Software using contour plots. From the results, better mechanical properties were found at a Cu/C ratio of 0.33 and samples with high C content (3 wt. %). In samples subject to long sintering time (3 h), the mechanism of precipitation of the second phase was mainly present, resulting in an improvement in mechanical properties. From the difference found between the elastic limit and the microhardness tests, it was found that there was an inefficient sintering process affecting the elastic limit test results. Additionally, X-ray analyses using the Rietveld program, were used for microstructural characterization and mechanical parameters of yield strength and ultimate tensile strength.

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“…Replacing a portion of Cu by Al results in a material featuring lighter weight and reduced cost when compared to Cu. Optimized processing of the composites provides advantageous materials applicable, e.g., in the aerospace and automotive [40,41], or electrotechnics [42]. Given by the combination of light weight and favorable mechanical properties, Al/Cu composites are believed to possibly supplement/replace steel in particular applications in vehicles and aircrafts [41].…”

Section: Introductionmentioning

confidence: 99%

“…Optimized processing of the composites provides advantageous materials applicable, e.g., in the aerospace and automotive [40,41], or electrotechnics [42]. Given by the combination of light weight and favorable mechanical properties, Al/Cu composites are believed to possibly supplement/replace steel in particular applications in vehicles and aircrafts [41]. The studies documented favorable durability of the Al/Cu clad composites during dynamic loading (strain rates up to 100 s −1 ), which can primarily be attributed to the development of deformation induced twins.…”

Section: Introductionmentioning

confidence: 99%

Structure Characteristics Affected by Material Plastic Flow in Twist Channel Angular Pressed Al/Cu Clad Composites

Kunčická

Klečková

2020

Materials

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The study focuses on structure analyses, texture analyses in particular, of an Al/Cu clad composite manufactured by single and double pass of the twist channel angular pressing (TCAP) method. Microscopic analyses were supplemented with numerical predictions focused on the effective imposed strain and material plastic flow, and microhardness measurements. Both the TCAP passes imparted characteristic texture orientations to the reinforcing Cu wires, however, the individual preferential grains’ orientations throughout the composite differed and depended on the location of the particular wire within the Al sheath during extrusion, i.e., on the dominant acting strain path. The second TCAP pass resulted in texture homogenization; all the Cu wires finally exhibited dominant A fiber shear texture. This finding was in accordance with the homogenization of the imposed strain predicted after the second TCAP pass. The results also revealed that both the component metals exhibited significant deformation strengthening (which also caused bending of the ends of the Cu wires within the Al sheath after extrusion). The average microhardness of the Cu wires after the second pass reached up to 128 HV, while for the Al sheath the value was 86 HV.

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Effect of graphite additives on microstructure and mechanical properties of Al–Cu composites prepared by mechanical alloying and sintering

Cited by 16 publications

References 48 publications

Microstructure and Mechanical Properties of Novel Quasibinary Al-Cu-Yb and Al-Cu-Gd Alloys

Microstructure and Mechanical Properties of Novel Quasibinary Al-Cu-Yb and Al-Cu-Gd Alloys

Statistical and Microstructural Analyses of Al–C–Cu Composites Synthesized Using the State Solid Route

Structure Characteristics Affected by Material Plastic Flow in Twist Channel Angular Pressed Al/Cu Clad Composites

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