Development of a recovered/recrystallized multilayered microstructure in Al alloys by accumulative roll bonding

Quadir, Zakaria; Al-Buhamad, O.; Bassman, Lori; Ferry, Michael

doi:10.1016/j.actamat.2007.06.021

Cited by 105 publications

(54 citation statements)

References 30 publications

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“…Similar penetration of grain boundaries into a neighboring layer was observed also by Quadir et al [5] in laminates composed from high purity aluminum and AlSc alloy. This eect was attributed to the mobility of grain boundaries in Al layers.…”

Section: Methodssupporting

confidence: 68%

Recrystallization in Multilayer Al99.99/AlMg3 Laminates Prepared by Accumulative Roll-Bonding

et al. 2015

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Composite multilayer sheets from Al/AlMg3 with 32 alternating layers of Al and AlMg3 were prepared by accumulative roll-bonding and their thermal stability was studied. Recrystallized 2 mm thick sheets of a commercial twin-roll cast AlMg3 alloy and high purity Al99.99 served as input materials. Electrical resistivity measurements were used for the integral monitoring of solute atoms distribution during annealing. Light optical microscopy was employed for the direct grain-size determination and recrystallization description. Post-mortem electron microscopy observations were performed on as-prepared and annealed specimens and they were combined with in situ heating electron microscopy in order to explain the observed annealing eects. A broadening of Al layers during annealing was observed and related to diusion of magnesium.

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Section: Methodssupporting

confidence: 68%

Recrystallization in Multilayer Al99.99/AlMg3 Laminates Prepared by Accumulative Roll-Bonding

et al. 2015

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“…In Step 1, 13 layers (each 300 μm thickness) were stacked and were rolled to 390 μm in one pass. In Step 2, the rolled multilayer laminates were cut into two halves, surface treated, stacked, and rolled with a reduction ratio of around 56% at a temperature of 473 K [24] in order to achieve a good bonding quality.…”

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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“…Goss/Brass volume fraction ratio has great influence on the fracture toughness of the alloy, and the higher the ratio, the higher the fracture toughness of the materials 16 . Most previous studies about the effect of texture evolution on the mechanical properties of aluminum alloys are concentrated on just one single pass of the rolling, either hot rolling or cold rolling 11,[17][18][19][20][21] . It should be noted that multipass rolling deformation, including both cold rolling and hot rolling, are required for 6111 aluminum alloys to be used as automotive skin and other structural members in machinery, and the texture evolution during each rolling pass might affect significantly the final mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Texture, Microstructure and Mechanical Properties of 6111 Aluminum Alloy Subject to Rolling Deformation

et al. 2017

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The mechanical properties, texture and microstructural evolution of a 6111 aluminum alloy during hot rolling and cold rolling deformation were systematically investigated in this article. The results show that cold rolling and hot rolling have significant effects on the tensile behaviors of the alloy. The shear texture and recrystallization texture mainly formed during the hot rolling deformation process, while the rolling texture mainly formed during the cold rolling deformation. The grain refinement mechanisms depend significantly on the rolling process. Movement of shear zone and recrystallization are the main grain refinement mechanisms during the hot rolling process, while dislocations tangling is the main grain refinement mechanism during the cold rolling process. The recrystallization textures and shear textures affect the anisotropy in elongation but the rolling textures affect significantly the anisotropy in yield strength.

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Development of a recovered/recrystallized multilayered microstructure in Al alloys by accumulative roll bonding

Cited by 105 publications

References 30 publications

Recrystallization in Multilayer Al99.99/AlMg3 Laminates Prepared by Accumulative Roll-Bonding

Recrystallization in Multilayer Al99.99/AlMg3 Laminates Prepared by Accumulative Roll-Bonding

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

Texture, Microstructure and Mechanical Properties of 6111 Aluminum Alloy Subject to Rolling Deformation

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