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

Roy, Shibayan and Nataraj, BR and Suwas, Satyam and Kumar, S and Chattopadhyay, K (2012) Microstructure and texture evolution during accumulative roll bonding of aluminium alloys AA2219/AA5086 composite laminates. In: JOURNAL OF MATERIALS SCIENCE, 47 (17). pp. 6402-6419.

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Abstract

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 ARB-processed 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.

Item Type:	Journal Article
Publication:	JOURNAL OF MATERIALS SCIENCE
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to Springer
Keywords:	STACKING-FAULT ENERGY;MECHANICAL-PROPERTIES;PLASTIC-DEFORMATION;GRAIN-REFINEMENT;ARB PROCESS;RECRYSTALLIZATION TEXTURE;COLD DEFORMATION;SINGLE-CRYSTALS;PURITY ALUMINUM; SHEAR BANDS
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	14 Jul 2012 07:51
Last Modified:	14 Jul 2012 07:52
URI:	http://eprints.iisc.ac.in/id/eprint/44786

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