A comparative analysis of the stored energy in shear-oriented grains and mechanical properties in two Al-Mg-Si alloys processed by equal-channel angular processing

This research presents a comparative analysis of stored energy evolution in grains with A_1* {111} <¬1¬12>, A_2* {111} <1¬21>, A {111} <1¬10>, ¬A {111} <0¬11> , B {112} <1¬10>, ¬B {112} <1¬10>, and C {100} <110> shear orientations for AA6060 and AA6082 alloy...

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Bibliographic Details
Authors: Khelfa, Tarek, Muñoz Bolaños, Jairo Alberto|||0000-0002-6129-0799, Azzeddine, Hiba, Chen, Zhiguo, Cabrera Marrero, José M.|||0000-0001-8417-1736, Khitouni, Mohamed
Format: article
Publication Date:2024
Country:España
Institution:Universitat Politècnica de Catalunya (UPC)
Repository:UPCommons. Portal del coneixement obert de la UPC
Language:English
OAI Identifier:oai:upcommons.upc.edu:2117/425616
Online Access:https://hdl.handle.net/2117/425616
https://dx.doi.org/10.1007/s11665-024-10315-x
Access Level:Open access
Keyword:Al-Mg-Si alloys
Equal-channel angular pressing
Shear texture
Stored energy
Mechanical properties
Description
Summary:This research presents a comparative analysis of stored energy evolution in grains with A_1* {111} <¬1¬12>, A_2* {111} <1¬21>, A {111} <1¬10>, ¬A {111} <0¬11> , B {112} <1¬10>, ¬B {112} <1¬10>, and C {100} <110> shear orientations for AA6060 and AA6082 alloys after equal-channel angular pressing (ECAP) processing up to eight passes at room (RT) and warm (250 °C) temperatures, respectively. At the earlier stage of deformation, the stored energy values for the AA6060 alloy were relatively high in all shear-oriented grains and then varied heterogeneously with increase in number of ECAP passes. Consequently, the tensile strength and ductility were improved simultaneously. For the AA6082 alloy, the stored energy in all shear-oriented grains was low and gradually increased with the number of ECAP passes. As a result, the AA6082 alloy showed a decrease in tensile strength. The ECAP-processed AA6060 alloy at RT exhibited higher dislocation density and lower grain size, indicating a continuous dynamic recrystallization (CDRX) mechanism. However, the ECAP-processed AA6082 alloy at a warm temperature showed lower dislocation density and a larger grain size, which corresponds to a discontinuous dynamic recrystallization (DDRX) mechanism.

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