Tensile properties and fracture characteristics of ECAP-processed Al and Al-Cu alloys

Aal, Mohamed Ibrahim Abd El; Mahallawy, Nahed El; Shehata, F.; Hameed, Mohamed Abd El; Yoon, Eun Yoo; Lee, Jung Hwan; Kim, Hyoung Seop

doi:10.1007/s12540-010-1003-x

Cited by 39 publications

(8 citation statements)

References 26 publications

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“…The size of the dimples of the different specimens decreased after the first and second passes (Figure 9b,c). Similar observations of decreases in dimple size have been noted after SPD processing of various materials [36,41,56]. However, larger deep dimples were noted in the present work compared to those of Al-brass specimens deformed using different processes [47,48,[57][58][59].…”

Section: Tensile Properties and Fracturesupporting

confidence: 90%

Parallel Tubular Channel Angular Pressing (PTCAP) Processing of the Cu-20.7Zn-2Al Tube

Aal

Gadallah

2022

Materials

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Commercial Al-brass tube was successfully processed by Parallel Tubular Channel Angular Pressing (PTCAP) in 2 passes under an imposed strain of 1.49 per pass. The effect of the number of PTCAP passes on the microstructure and the mechanical properties (hardness, tensile, and wear mass loss) of the Al-brass tubes was fully investigated. The average grain size of the as-received tube decreased to 1.28 μm after up to two passes of PTCAP with a mixture of ultrafine grain (UFG) and coarse grain (CG). The annealed tubes’ tensile strength and Vickers hardness increased by 237.65% and 175.6%, respectively, after two passes. In addition, a ductile fracture occurred with a clear necking. The fracture surface morphology indicated an apparent decrease in dimple size after PTCAP processing, combined with a decrease in ductility. Moreover, the wear mass loss decreased with increasing number of PTCAP passes due to the decrease in the grain size, and the increase of the hardness of the tubes was enhanced after PTCAP processing.

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Section: Tensile Properties and Fracturesupporting

confidence: 90%

Parallel Tubular Channel Angular Pressing (PTCAP) Processing of the Cu-20.7Zn-2Al Tube

Aal

Gadallah

2022

Materials

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“…Processes 2022, 10, x FOR PEER REVIEW 8 of 31 room temperature through route A, respectively [58]. The same conditions are applied in his other articles paper, it was also found that the average grain size was reduced from 390 μm to 1.8 μm, 0.4 μm and 0.3 μm after two, four and ten passes, respectively [59].…”

Section: Grain Size From 01-1 μMmentioning

confidence: 59%

“…Similar to titanium, the grain size of Al can be reduced to a sub-micron scale with the increasing pass. Aal et al showed that the average grain size of pure Al was 1.7 µm after two passes of ECAP and decreased to 0.43 µm and 0.23 µm after four and ten passes at room temperature through route A, respectively [58]. The same conditions are applied in his other articles paper, it was also found that the average grain size was reduced from 390 µm to 1.8 µm, 0.4 µm and 0.3 µm after two, four and ten passes, respectively [59].…”

Section: Grain Size From 01-1 μMmentioning

confidence: 99%

Recent Advances in the Equal Channel Angular Pressing of Metallic Materials

et al. 2022

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Applications of a metallic material highly depend on its mechanical properties, which greatly depend on the material’s grain sizes. Reducing grain sizes by severe plastic deformation is one of the efficient approaches to enhance the mechanical properties of a metallic material. In this paper, severe plastic deformation of equal channel angular pressing (ECAP) will be reviewed to illustrate its effects on the grain refinement of some common metallic materials such as titanium alloys, aluminum alloys, and magnesium alloys. In the ECAP process, the materials can be processed severely and repeatedly in a designed ECAP mold to accumulate a large amount of plastic strain. Ultrafine grains with diameters of submicron meters or even nanometers can be achieved through severe plastic deformation of the ECAP. In detail, this paper will give state-of-the-art details about the influences of ECAP processing parameters such as passes, temperature, and routes on the evolution of the microstructure of metallic materials. The evolution of grain sizes, grain boundaries, and phases of different metallic materials during the ECAP process are also analyzed. Besides, the plastic deformation mechanism during the ECAP process is discussed from the perspectives of dislocation slipping and twinning.

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“…For example, most Al–Cu alloys (containing 2–4 wt%Cu) subjected to SPD have uniform grain structures, ultimate tensile strengths (UTSs) of 290–500 MPa and uniform elongations of 1–4% (Prados et al, 2009; Fang et al, 2011). Tensile properties of an equal channel angular pressing (ECAP) processed Al–5 wt%Cu alloy were noted in El Al et al (2010), in which a UTS of 493 MPa and an elongation to failure less than 10% were achieved after eight passes. By applying ECAP processing, with four passes, to the Al–4Cu alloy, a high UTS value of about 270 MPa and an elongation to failure of about 8% were obtained (Prados et al, 2009).…”

Section: Introductionmentioning

confidence: 95%

Ultrafine-Grained Microstructures of Al–Cu Alloys with Hypoeutectic and Hypereutectic Composition Produced by Extrusion Combined with Reversible Torsion

et al. 2022

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In this study, binary as-cast Al–Cu alloys: Al25Cu (Al–25%Cu) and Al45Cu (Al–45%Cu) (in wt%) were severely plastically deformed by extrusion combined with a reversible torsion (KoBo) method to produce an ultrafine-grained structure (UFG). The binary Al–Cu alloys consist of α-Al and intermetallic Al2Cu phases. The morphology and volume fraction of α-Al and Al2Cu phases depend on the Cu content. The KoBo process was carried out using extrusion ratios of λ = 30 and λ = 98. The effect of phase refinement has been studied by means of scanning electron microscopy with electron backscattering diffraction and scanning transmission electron microscopy. The mechanical properties were assessed using compression tests. Detailed microstructural analysis shows that after the KoBo process, a large number fraction of high-angle boundaries (HABs) and a very fine grain structure (~2–4 μm) in both phases are created. An increase of λ ratio during the KoBo processing leads to a decrease in average grain size of α-Al and Al2Cu phases and an increase in fraction of HABs. UFG microstructure and high fraction of HABs provide the grain boundary sliding mechanism during KoBo deformation. UFG microstructure contributes to the enhanced mechanical properties. Compressive strength (Rc) of Al25Cu alloy increases from 172 to 340 MPa with an increase of λ. Compressive strain (Sc) for Al25Cu alloy increased from 35 to 67% with an increase of λ. High fraction of intermetallic phase in Al45Cu alloy was responsible for room temperature strengthening of alloy and low compressive strain. The deformed Al45Cu alloy with λ = 30 showed that Rc is 194 MPa and Sc is equal to 10%.

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Tensile properties and fracture characteristics of ECAP-processed Al and Al-Cu alloys

Cited by 39 publications

References 26 publications

Parallel Tubular Channel Angular Pressing (PTCAP) Processing of the Cu-20.7Zn-2Al Tube

Parallel Tubular Channel Angular Pressing (PTCAP) Processing of the Cu-20.7Zn-2Al Tube

Recent Advances in the Equal Channel Angular Pressing of Metallic Materials

Ultrafine-Grained Microstructures of Al–Cu Alloys with Hypoeutectic and Hypereutectic Composition Produced by Extrusion Combined with Reversible Torsion

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