Effect of Mg content on microstructure, texture and strength of severely equal channel angular pressed aluminium-magnesium alloys

Kalsar, R and Yadav, D and Sharma, A and Brokmeier, HG and May, J and Höppel, HW and Skrotzki, W and Suwas, S (2020) Effect of Mg content on microstructure, texture and strength of severely equal channel angular pressed aluminium-magnesium alloys. In: Materials Science and Engineering A, 797 .

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Abstract

Equal channel angular pressing was carried out on Al�Mg alloys to study the effect of Mg addition on the microstructure, texture and strength after severe plastic deformation by 8 passes of equal channel angular pressing (ECAP) through route Bc. The increase in Mg content enhanced the propensity of continuous dynamic recrystallization and simultaneously decreased the average grain size of the alloy. The microstructure and local texture was heterogeneous across the billet thickness for all the samples, irrespective of composition. All the samples showed a shear-type bulk texture generally observed in face-centred cubic metals with strong BE/�BE components. The weakening of the texture with increase in Mg content is attributed to the substructure evolution during the ECAP process. The grain size and dislocation density have been determined by X-ray diffraction line profile analysis. The experimentally determined yield strength of the ultrafine grained samples can be explained by a combination of solid solution, dislocation and grain size strengthening, the latter being predominant.

Item Type:	Journal Article
Publication:	Materials Science and Engineering A
Publisher:	Elsevier Ltd
Additional Information:	The copyright of this article belongs to Elsevier Ltd
Keywords:	Dynamic recrystallization; Grain size and shape; Magnesium alloys; Pressing (forming); Textures, Aluminium-magnesium alloys; Continuous dynamic recrystallization; Dislocation densities; Equal channel angular pressed; Grain-size strengthening; Severe plastic deformations; Substructure evolution; X ray diffraction line profile analysis, Equal channel angular pressing
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	31 Aug 2020 08:54
Last Modified:	31 Aug 2020 08:54
URI:	http://eprints.iisc.ac.in/id/eprint/66411

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