An Investigation of Interface Bonding of Bimetallic Foils by Combined Accumulative Roll Bonding and Asymmetric Rolling Techniques

Yu, Hailiang; Lü, Cheng; Godbole, Ajit R

doi:10.1007/s11661-014-2311-4

Cited by 27 publications

(8 citation statements)

References 29 publications

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“…The rolling speed ratio between the upper and lower rolls was set as 1.3, which results in the best bonding during laminate AR. [23] Fig. 1 shows a schematic illustration of the process.…”

Section: Methodsmentioning

confidence: 99%

High Strength and Ductility of Ultrathin Laminate Foils Using Accumulative Roll Bonding and Asymmetric Rolling

Tieu

Hadi

et al. 2014

Metall Mater Trans A

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As product miniaturization is becoming widely popular, many microparts are being produced by microforming of sheets/foils, whose strength needs to be able to maintain structural stability of the microcomponents. In addition, their strength and ductility of foils generally reduce with a reduction in the thickness due to the size effect. In this paper, we report the fabrication of an aluminum laminate foil using a combined process of accumulative roll bonding (ARB) and asymmetric rolling (AR). It was found that this improves both strength and ductility. TEM results show that the laminate structures produced by ARB develop an inhomogeneous microstructure with nanoscale grains and abnormal coarsening in some grains during AR processing. Both these effects result in an improved ductility and strength. Using these rolled products, micro-cups of very small wall thickness/cup diameter ratio (1/200) have been successfully fabricated by micro-deep drawing without the need for annealing. KeywordsAluminum alloy; Nanostructure; Abnormal grain growth; Rolling; Deep drawing; Ultrathin laminate foil Disciplines Engineering | Science and Technology Studies Publication DetailsYu, H., Tieu, A. Kiet., Hadi, S., Lu, C., Godbole, A. & Kong, C. (2015). High strength and ductility of ultrathin laminate foils using accumulative roll bonding and asymmetric rolling. Metallurgical Abstract: As product miniaturization is becoming widely popular, many microparts are being produced by microforming of sheets/foils, whose strength needs to be able to maintain structural stability of the micro components. In addition, their strength and ductility of foils generally reduces with a reduction in the thickness due to the size effect. In this paper, we report the fabrication of an aluminum laminate foil using a combined process of Accumulative Roll Bonding (ARB) and Asymmetric Rolling (AR). It was found that this improves both strength and ductility. TEM results show that the laminate structures produced by ARB develop an inhomogeneous microstructure with nanoscale grains and abnormal coarsening in some grains during AR processing. Both these effects result in an improved ductility and strength. Using these rolled products, micro-cups of very small wall thickness/cup diameter ratio (1/200) have been successfully fabricated by micro deep drawing without the need for annealing.

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“…The rolling speed ratio between the upper and lower rolls was set as 1.3, which results in the best bonding during laminate AR. [23] Fig. 1 shows a schematic illustration of the process.…”

Section: Methodsmentioning

confidence: 99%

High Strength and Ductility of Ultrathin Laminate Foils Using Accumulative Roll Bonding and Asymmetric Rolling

Tieu

Hadi

et al. 2014

Metall Mater Trans A

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“…The technique can improve the mechanical properties of Al etc. [126][127][128][129][130][131] The development of SPD techniques has enabled significant improvement in the strength of UFG/NG materials. However, most UFG/NG materials still lack the necessary toughness required in engineering applications although there are many the mechanisms for enhancing ductility of UFG/NG metals.…”

Section: Discussionmentioning

confidence: 99%

“…Experimental results revealed improved bonding with no necking of the individual layers after tensile testing. Yu et al [126,128] studied the bonding strength of ultrathin UFG bimetal foils produced using ARB followed by AR.…”

Section: Fig 24 Illustration Of Ultrathin Foils By Arb and Asymmetricmentioning

confidence: 99%

Special Rolling Techniques for Improvement of Mechanical Properties of Ultrafine‐Grained Metal Sheets: a Review

Lü

Tieu

et al. 2015

Adv Eng Mater

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Interest in ultrafine-grained (UFG) materials has grown rapidly in past 20 years. This review focuses on the application of special rolling techniques for improvement of the mechanical properties of UFG metal sheets. These techniques include asymmetric rolling, cryorolling, asymmetric cryorolling, cross-accumulative roll bonding, and skin-pass rolling. The techniques also include a combination of processes such as equal channel angular press and subsequent rolling, combined high-pressure torsion and subsequent rolling, as well as combined accumulative roll bonding and subsequent asymmetric rolling. We also discuss the main mechanisms leading to improvement in the ductility of UFG materials related to the special rolling techniques. properties of ultrafine-grained (UFG) metal sheets. These techniques include asymmetric rolling, cryorolling, asymmetric cryorolling, cross-accumulative roll bonding and skin-pass rolling. The techniques also include a combination of processes such as equal channel angular press and subsequent rolling, combined high pressure torsion and subsequent rolling, as well as combined accumulative roll bonding and subsequent asymmetric rolling. We also discuss the main mechanisms leading to improvement in the ductility of UFG materials related to the special rolling techniques.

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“…As it is relatively difficult to directly measure the plastic strain and stress distributions at the interface of the laminated composites in a hot-rolling process, Zhang et al [150] used a FE analysis (Deform 2D software program) to characterize the bonding behavior of the laminated composites. Yu et al [151] used a FE simulation to investigate the interface bonding quality of bimetallic foils produced by a combination of ARB and asymmetric rolling techniques. LS-DYNA software was employed to simulate the deformation of the bimetallic foils at various experimental conditions wherein a particular attention was placed on the interfacial bonding between AA1050 and AA6061 layers.…”

Section: Computational Studiesmentioning

confidence: 99%

Accumulative Roll Bonding—A Review

2019

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Different manufacturing processes can be utilized to fabricate light-weight high-strength materials for their applications in a wide spectrum of industries such as aerospace, automotive and biomedical sectors among which accumulative roll bonding (ARB) is a promising severe plastic deformation (SPD) method capable of creating ultrafine grains (UFG) in the final microstructure. The present review discusses recent advancements in the ARB process starting with the ARB basics, intricacies of the underlying mechanisms and physics, different materials, surface and rolling parameters, and finally its key effects on different properties such as strength, ductility, fatigue, toughness, superplasticity, tribology and thermal characteristics. Moreover, results of recent computational investigations have also been briefed towards the end. It is believed that ARB processing is an emerging area with tremendous opportunities in the industrial sector and ample potential in tailoring microstructures for high-performance materials.

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An Investigation of Interface Bonding of Bimetallic Foils by Combined Accumulative Roll Bonding and Asymmetric Rolling Techniques

Abstract: An investigation of interface bonding of bimetallic foils by combined An investigation of interface bonding of bimetallic foils by combined accumulative roll bonding and asymmetric rolling techniques accumulative roll bonding and asymmetric rolling techniques

Cited by 27 publications

References 29 publications

High Strength and Ductility of Ultrathin Laminate Foils Using Accumulative Roll Bonding and Asymmetric Rolling

High Strength and Ductility of Ultrathin Laminate Foils Using Accumulative Roll Bonding and Asymmetric Rolling

Special Rolling Techniques for Improvement of Mechanical Properties of Ultrafine‐Grained Metal Sheets: a Review

Accumulative Roll Bonding—A Review

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