Characterization of microstructure and texture of binary Mg-Ce alloy processed by equal channel angular pressing

Sadi, Salaheddine; Hanna, Abdelkader; Azzeddine, Hiba; Casas, C.; Baudin, Thierry; Helbert, Anne‐Laure; Brisset, François; Cabrera, José‐María

doi:10.1016/j.matchar.2021.111454

Cited by 13 publications

(39 citation statements)

References 95 publications

(146 reference statements)

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“…Several DRX mechanisms have been evidenced in Mg-based alloys depending on the deformation processing conditions and alloying elements [11][12][13][14][15]. For example, twin-induced dynamic recrystallization (TDRX) and particle stimulated nucleation (PSN) are the mechanisms responsible for the occurrence of DRX at low strain and then transited to sub-grain development (SD) and grain boundary bulging dynamic recrystallization (GBBDRX) with increasing strain in ECAP processed Mg-0.3Ce (wt.%) alloy [11]. Subsequently, each mechanism has a direct consequence on texture development [11].…”

Section: Introductionmentioning

confidence: 99%

“…For example, twin-induced dynamic recrystallization (TDRX) and particle stimulated nucleation (PSN) are the mechanisms responsible for the occurrence of DRX at low strain and then transited to sub-grain development (SD) and grain boundary bulging dynamic recrystallization (GBBDRX) with increasing strain in ECAP processed Mg-0.3Ce (wt.%) alloy [11]. Subsequently, each mechanism has a direct consequence on texture development [11]. In addition, increasing deformation temperatures completely change the microstructure and texture due to the occurrence of grain growth [11].…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, each mechanism has a direct consequence on texture development [11]. In addition, increasing deformation temperatures completely change the microstructure and texture due to the occurrence of grain growth [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure and texture evolution of ECAP-processed Mg-Ce alloy during isothermal annealing

Sadi

Hanna

Baudin

et al. 2022

Materials Today Communications

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure and texture evolution of ECAP-processed Mg-Ce alloy during isothermal annealing

Sadi

Hanna

Baudin

et al. 2022

Materials Today Communications

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“…GOS approach allows quantifying the fraction of recrystallized grains, Frex, by assuming a deviation from the average orientation of the recrystallized grains less than 2° [15,41]. The Frex is shown on the upper side of the GOS map.…”

Section: Deformation Microstructurementioning

confidence: 99%

“…At high temperatures, the formability of Mg-based alloys is increased and improved since further slip systems could be thermally activated and also due to the occurrence of DRX. In fact, DRX is the principal mechanism responsible for grain refinement in Mg-based alloys during deformation processing [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of static recrystallization and grain growth kinetics of hot-rolled AZ31 alloy

et al. 2022

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The static recrystallization/grain growth kinetics of the AZ31 (Mg-3Al-1Zn, wt%) alloy were investigated employing Vickers microhardness and electron backscatter diffraction (EBSD) measurements. The AZ31 alloy was subject to a hot-rolling for 70% of thickness reduction and then annealed at various temperatures (150°C, 250°C, and 350°C) from 5 min to 24 h. First, the static recrystallization kinetics were analysed by means of the Johnson-Mehl-Avrami-Kolmogorov (JMAK) model. The results showed that the recrystallization occurred under two regimes both involving their own Avrami exponent/ activation energy. In regime I, the Avrami exponent was found in the range of 1.5-0.35 depending on the annealing temperature and activation energy of 74.1±5.7 kJ×mol-1. In regime II, an identical value of Avrami exponent was found (0.1-0.2) and a very low activation energy of 14.8±0.7 kJ×mol-1 was found for all annealing conditions. Non-random nucleation sites such as shear bands were considered as the main factor responsible for the deviation from the JMAK model. Moreover, the grain growth kinetics was well fitted by the general equation where . Accordingly, Qg = 109± 0.2 kJ×mol-1 which is median between grain boundary diffusion and bulk diffusion values for Mg and its alloys. The derived activation energies were discussed in terms of influencing factors such as solute drag, formation of basal texture, and microstructural heterogeneities like shear bands and twinning.

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Investigation of Microstructure and Texture Evolution in an AZ31/Mg–Gd Alloy Hybrid Metal Fabricated by High‐Pressure Torsion

et al. 2023

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High-pressure torsion (HPT) processing is successfully applied to fabricate a novel hybrid material from separate discs of AZ31 (Mg-3Al-1Zn, wt%) and Mg-0.6Gd (wt%) alloys by straining through numbers of rotations, N, of 1/4, 1/2, 5, 10, and 20 turns at room temperature. The microstructure and texture are investigated near the bonding interface through the disc diameter using electron backscatter diffraction (EBSD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The microstructure exhibits two grain refinement regimes with the first occurring during an equivalent strain range, ε eq , of %0.3-72 and the second during ε eq from %72 to 517. The general texture changes from B-fiber to Y-fiber and C 2 -fiber through the HPT processing. The resultant microstructures and textures of this hybrid alloy are examined separately for the AZ31 and Mg-0.6Gd alloys and found controlled by the presence of twinning, slip systems, and second phases and the occurrence of different dynamic recrystallization mechanisms.

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Characterization of microstructure and texture of binary Mg-Ce alloy processed by equal channel angular pressing

Cited by 13 publications

References 95 publications

Microstructure and texture evolution of ECAP-processed Mg-Ce alloy during isothermal annealing

Microstructure and texture evolution of ECAP-processed Mg-Ce alloy during isothermal annealing

Evaluation of static recrystallization and grain growth kinetics of hot-rolled AZ31 alloy

Investigation of Microstructure and Texture Evolution in an AZ31/Mg–Gd Alloy Hybrid Metal Fabricated by High‐Pressure Torsion

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