A novel technique to form gradient microstructure in AA5052 alloy

Hassanpour, Hossein; Jamaati, Roohollah; Hosseinipour, Seyed Jamal

doi:10.1016/j.msea.2020.139075

Cited by 28 publications

(2 citation statements)

References 67 publications

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“…Based on Figure 8c,d, no obvious necking can be found before its tensile fracture, and the dimples on the fracture surface became smaller and shallower, which can explain the lower elongation compared to AA1050. There are studies indicating that aluminum alloys have two macroscopic fracture modes, namely, shear fracture mode and dimple fracture mode [32,33]. From the perspective of the microscopic mechanism, shear fracture is caused by the cracking and aggregation of microscopic shear planes within the material.…”

Section: Microstructure Analysis Of Aa1050/aa6061 Laminated Compositesmentioning

confidence: 99%

Microstructure and Mechanical Properties of AA1050/AA6061 Laminated Composites Fabricated through Three-Cycle Accumulative Roll Bonding and Subsequent Cryorolling

Song,

Gao,

Wang

et al. 2024

Materials

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In this study, AA1050/AA6061 laminated composites were prepared by three-cycle accumulative roll bonding (ARB) and subsequent rolling. The effects of the rolling process on the microstructure evolution and mechanical properties of AA1050/AA6061 laminated composites were systematically investigated. The results indicate that the mechanical properties of the laminated composites can be effectively improved by cryorolling compared with room-temperature rolling. The microstructure analysis reveals that cryorolling can suppress the necking of the hard layer to obtain a flat lamellar structure. Moreover, the microstructure characterized by transmission electron microscopy shows that cryorolling can inhibit the dynamic recovery and significantly refine the grain size of the constituent layers. Meanwhile, the tensile fracture surface illustrates that AA1050/AA6061 laminated composites have the optimal interfacial bonding quality after cryorolling. Therefore, the laminated composites obtain excellent mechanical properties with the contribution of these factors.

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Section: Microstructure Analysis Of Aa1050/aa6061 Laminated Compositesmentioning

confidence: 99%

Microstructure and Mechanical Properties of AA1050/AA6061 Laminated Composites Fabricated through Three-Cycle Accumulative Roll Bonding and Subsequent Cryorolling

Song,

Gao,

Wang

et al. 2024

Materials

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“…The ease of joining E and FS processes offers the possibility of experimenting with them, especially as concerns the parts controlling the flow of the worked material, i.e., the plunger face. The gradient structure is created in various metallic materials to increase their strength [ 9 , 10 , 11 ] or obtain better electrical properties [ 12 ]. In most cases, obtaining this microstructure in a wire requires a multi-stage process based on plastic deformation by twisting [ 12 ] or compression bonding [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Modification of Mechanical Properties of Aluminum Alloy Rods via Friction-Extrusion Method

2020

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The elaboration of a modified friction-extrusion method aimed at obtaining 2017A aluminum rods of gradient microstructure is described. This was achieved by cutting spiral grooves on the face of the stamp used for alloy extrusion. The experiments were carried out at a constant material feed (~10 mm/min) and a range of tool rotation speeds (80 to 315 rpm). The microstructure observations were carried out using light microscopy (LM) and both scanning and transmission electron microscopy (SEM and TEM). The mechanical properties were assessed through hardness measurements and static tensile tests. The performed investigations show that material simultaneous radial and longitudinal flow, enforced by friction of the rotating tool head and extrusion, results in the formation of two zones of very different microstructures. At the perpendicular section, the outer zone stands out from the core due to circumferential elongation of strings of particles, while in the inner zone the particles are arranged in a more uniform way. Simultaneously, the grain size of the outer zone is refined by two to four times as compared with the inner one. The transfer from the outer zone to the core area is of gradient type. The hardness of the outer zone was found to be ~10% to ~20% higher than that of the core.

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