Accumulative roll bonding of aluminum alloys 2219/5086 laminates: Microstructural evolution and tensile properties

Roy, Shibayan; Nataraj, B.; Suwas, Satyam; Kumar, Shakti; Chattopadhyay, K.

doi:10.1016/j.matdes.2011.11.015

Cited by 100 publications

(50 citation statements)

References 33 publications

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“…The former condition characterizes the strain hardening of the two alloy layers as a result of ARB, whereas the later condition signifies the difference in the starting strength properties between the alloys before the subsequent ARB pass. The hardness of the AA2219 alloy is comparatively lower than that of the AA5086 alloy in the starting cold rolled and annealed condition which follows the trend observed via tensile tests for this condition [52]. After the 1st pass of ARB, the hardness increases considerably for both the alloys from the starting condition.…”

Section: Microstructural Evolutionsupporting

confidence: 75%

“…In the present study, the AA2219 alloy is age hardened wherein the strength of the AA5086 alloy is governed by solid solution and strain hardening [51]. At the start of the ARB process, the yield strength of the AA5086 alloy (*450 MPa) is higher than that of the AA2219 alloy strip (*325 MPa), although the latter alloy shows substantial precipitate formation [52]. It is important to mention that the strength values are measured for the two alloys in the cold rolled and annealed (400°C for 1 h) condition before ARB processing.…”

Section: Microstructural Evolutionmentioning

confidence: 99%

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Microstructure and texture evolution during accumulative roll bonding of aluminium alloys AA2219/AA5086 composite laminates

et al. 2012

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Accumulative roll bonding of two aluminium alloys, AA2219 and AA5086 was carried out up to 8 passes. During the course of ARB, the deformation inhomogeneity between the two alloy layers results in interfacial instability after the 4th pass, necking of the AA5086 layers after the 6th pass and fracture along the necked regions after the 7th and 8th pass. The EBSD analysis shows deformation bands along the interfaces after 8 passes of ARB. The ARBprocessed materials predominantly show characteristic deformation texture components. The weak texture after the 2nd pass results from the combination of a weakly-textured starting AA2219 layer and a strongly-textured starting AA5086 layer. A strong deformation texture forms due to the high imposed strain after a higher number of ARB passes. Subgrain formation and related shear banding induces copper/S components in the case of the small elongated grains, while planar slip leads to the formation of brass component in the large elongated grains.

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Section: Microstructural Evolutionsupporting

confidence: 75%

Section: Microstructural Evolutionmentioning

confidence: 99%

Microstructure and texture evolution during accumulative roll bonding of aluminium alloys AA2219/AA5086 composite laminates

et al. 2012

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“…An important and effective way to approach the superior properties is by refining the structure, within 2 of 12 which thermal-mechanical heat treatment and severe plastic deformation have been developed in the past decade. Severe plastic deformation techniques, such as equal-channel accumulative roll bonding [12], angular pressing [13], high-pressure torsion, and friction stir processing [14], are effective approaches to refine the microstructure. However, the above techniques yield small sizes and quantities in the laboratory, but are not suitable for industrialized production [15].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of a Spray-Deposited Al-8.31Zn-2.07Mg-2.46Cu-0.12Zr Alloy

Sheng

Lei

Xiao

et al. 2017

Metals

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Abstract:Metallic materials have a significant number of applications, among which Al alloys have drawn people's attention due to their low density and high strength. High-strength Al-based alloys, such as 7XXX Al alloys, contain many alloying elements and with high concentration, whose microstructures present casting voids, segregation, dendrites, etc. In this work, a spray deposition method was employed to fabricate an Al-8.31Zn-2.07Mg-2.46Cu-0.12Zr (wt %) alloy with fine structure. The hot deformation behavior of the studied alloy was investigated using a Gleeble 1500 thermal simulator and electron microscopes. The microstructure evolution, variation in the properties, and precipitation behavior were systematically investigated to explore a short process producing an alloy with high property values. The results revealed that the MgZn 2 particles were detected from inside the grain and grain boundary, while some Al 3 Zr particles were inside the grain. An Arrhenius equation was employed to describe the relationship between the flow stress and the strain rate, and the established constitutive equation was that: Figure 7 gives the hardness variations of the hot compressed samples aged at 120 • C fo durations. For the samples after being hot-compressed at strain rates of 1 s −1 and 0.001 s −1 , present the same trend. The initial hardness of compressed samples increased with the hot de temperature. The hardness of the hot-compressed samples increased with the aging time, a kept constant as they were aging at certain temperatures for 15 h.Metals 2017, 7, 299 deformation temperature. The hardness of the hot-compressed samples increased with the and almost kept constant as they were aging at certain temperatures for 15 h. Discussion Constitutive EquationThe constitutive relationships were used to describe the hot deformation behavior. Som are employed to reveal the hot deformation behavior, in which one of the most extended v the hot working constitutive equation is as follows [24]:where ε is the strain rate; A is a material constant which is independent of temperature true stress; Q is the activation energy; R is the gas constant (8.31); and T is the absolute tem (K). At low stress lever (ασ < 0.8):At high stress lever (ασ > 1.2):(σ) σ n F  , β and n are the material constants, α = β/n. Substituting Equations (2) and (3) (4) and (5), respectively, gives:The values of n and β are from the slopes of the lines in ln ε and σ, lnε and ln σ , Discussion Constitutive EquationThe constitutive relationships were used to describe the hot deformation behavior. Som are employed to reveal the hot deformation behavior, in which one of the most extended v the hot working constitutive equation is as follows [24]:where .ε is the strain rate; A is a material constant which is independent of temperature; σ is stress; Q is the activation energy; R is the gas constant (8.31); and T is the absolute tempera At low stress lever (ασ < 0.8):At high stress lever (ασ > 1.2): F(σ) = σ n , β and n are the material constants, α = β/n. Substit...

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“…Afterwards plastic instabilities in the harder material layers occur earlier than the other and the harder material experiences necking and fracture as the number of ARB cycles increases. This deformation behavior results in homogeneously distributed fragmentation of the hard material in the soft material matrix [5,[7][8][9][12][13][14]. Mechanical properties of the composite were influenced by the necking and rupture of the hard layers.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine grained AA1050/AA6061 composite produced by accumulative roll bonding

Lü

Tieu

et al. 2013

Materials Science and Engineering: A

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Accumulative roll bonding of aluminum alloys 2219/5086 laminates: Microstructural evolution and tensile properties

Cited by 100 publications

References 33 publications

Microstructure and texture evolution during accumulative roll bonding of aluminium alloys AA2219/AA5086 composite laminates

Microstructure and texture evolution during accumulative roll bonding of aluminium alloys AA2219/AA5086 composite laminates

Hot Deformation Behavior of a Spray-Deposited Al-8.31Zn-2.07Mg-2.46Cu-0.12Zr Alloy

Ultrafine grained AA1050/AA6061 composite produced by accumulative roll bonding

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