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Thermal Response on the Microstructure and Texture of ECAP and Cold-Rolled Pure Magnesium

Biswas, Somjeet and Singh, Satyaveer D and Beausir, Benoit and Toth, Laszlo S and Suwas, Satyam (2015) Thermal Response on the Microstructure and Texture of ECAP and Cold-Rolled Pure Magnesium. In: METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 46A (6). pp. 2598-2613.

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Official URL: http://dx.doi.org/10.1007/s11661-015-2846-z

Abstract

This paper deals with dynamic recrystallization (DRX), static recrystallization, and grain growth phenomena of pure magnesium after equal channel angular pressing (ECAP) by route A and B-C at 523 K (250 A degrees C) followed by 80 pct cold rolling. The ECAP-deformed and the subsequently rolled samples were annealed at 373 K and 773 K (100 A degrees C and 500 A degrees C). The associated changes in the microstructure and texture were studied using electron back-scattered diffraction. ECAP produced an average grain size of 12 to 18 A mu m with B and C-2 fiber textures. Subsequent rolling led to an average grain size 8 to 10 A mu m with basal texture fiber parallel to ND. There was no noticeable increase in the average grain size on annealing at 373 K (100 A degrees C). However, significant increase in the average grain size occurred at 773 K (500 A degrees C). The occurrence of different DRX mechanisms was detected: discontinuous dynamic recrystallization was attributed to basal slip activity and continuous dynamic recovery and recrystallization to prismatic/pyramidal slip systems. Only continuous static recrystallization could be observed on annealing.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords: CHANNEL ANGULAR EXTRUSION; GRAIN-SIZE; DYNAMIC RECRYSTALLIZATION; ROOM-TEMPERATURE; MG ALLOY; CRYSTALLOGRAPHIC TEXTURE; MECHANICAL-PROPERTIES; HOT DEFORMATION; EVOLUTION; AZ31
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 22 May 2015 07:11
Last Modified: 22 May 2015 07:11
URI: http://eprints.iisc.ac.in/id/eprint/51548

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