An investigation of the thermal stability of an Mg–Dy alloy after processing by high-pressure torsion
Authors: Hanna, A., Azzeddine, H., Huang, Y., Bradai, D., Cabrera, J.M. and Langdon, T.G.
Journal: Materials Characterization
Volume: 151
Pages: 519-529
ISSN: 1044-5803
DOI: 10.1016/j.matchar.2019.03.040
Abstract:An Mg-0.41Dy (wt%) alloy was successfully processed by high-pressure tension (HPT) through 5 turns at room temperature. The evolution of the recrystallization microstructure and the texture and mechanical properties of the deformed alloy were investigated after annealing at 200 and 400 °C for 1 h using Electron Backscatter Diffraction (EBSD) and Vickers measurements. The recrystallization temperature and activation energy were evaluated using Differential Scanning Calorimetry (DSC). Processing by HPT led to significant grain refinement with an average grain size of ~0.5 ± 0.1 μm which increased to ~1.2 ± 0.8 μm after annealing at 400 °C. This slow increase in grain size at a high temperature demonstrates a good thermal stability of the microstructure. The alloy exhibited two main fiber textures after HPT processing: firstly a typical basal fiber (φ 1 = 0–360°, Φ = 0° and φ 2 = 0–60°) and secondly a fiber localized at φ 1 = 180°, Φ = 60° and φ 2 = 0–90°. These textures were retained after annealing at 400 °C. There was no change in the microhardness value after annealing at 200 °C (41 ± 1 Hv) and only a minor decrease after annealing at 400 °C (38.4 ± 0.5 Hv). The DSC results showed that the temperature associated with the recrystallization process increased with increasing heating rate and the activation energy for recrystallization was measured as ~25 kJ mol −1 .
https://eprints.bournemouth.ac.uk/32113/
Source: Scopus
An investigation of the thermal stability of an Mg-Dy alloy after processing by high-pressure torsion
Authors: Hanna, A., Azzeddine, H., Huang, Y., Bradai, D., Maria Cabrera, J. and Langdon, T.G.
Journal: MATERIALS CHARACTERIZATION
Volume: 151
Pages: 519-529
eISSN: 1873-4189
ISSN: 1044-5803
DOI: 10.1016/j.matchar.2019.03.040
https://eprints.bournemouth.ac.uk/32113/
Source: Web of Science (Lite)
An investigation of the thermal stability of an Mg-Dy alloy after processing by high-pressure torsion
Authors: Hanna, A., Azzeddine, H., Huang, Y., Bradai, D., Cabrera, J.M. and Langdon, T.G.
Journal: Materials characterization
Volume: 151
Pages: 519-529
Publisher: Elsevier
ISSN: 1044-5803
DOI: 10.1016/j.matchar.2019.03.040
Abstract:An Mg-0.41Dy (wt%) alloy was successfully processed by high-pressure tension (HPT) through 5 turns at room temperature. The evolution of the recrystallization microstructure and the texture and mechanical properties of the deformed alloy were investigated after annealing at 200 and 400 °C for 1 h using Electron Backscatter Diffraction (EBSD) and Vickers measurements. The recrystallization temperature and activation energy were evaluated using Differential Scanning Calorimetry (DSC). Processing by HPT led to significant grain refinement with an average grain size of ~0.5 ± 0.1 μm which increased to ~1.2 ± 0.8 μm after annealing at 400 °C. This slow increase in grain size at a high temperature demonstrates a good thermal stability of the microstructure. The alloy exhibited two main fiber textures after HPT processing: firstly a typical basal fiber (φ1 = 0–360°, Φ = 0° and φ2 = 0–60°) and secondly a fiber localized at φ1 = 180°, Φ = 60° and φ2 = 0–90°. These textures were retained after annealing at 400 °C. There was no change in the microhardness value after annealing at 200 °C (41 ± 1 Hv) and only a minor decrease after annealing at 400 °C (38.4 ± 0.5 Hv). The DSC results showed that the temperature associated with the recrystallization process increased with increasing heating rate and the activation energy for recrystallization was measured as ~25 kJ mol−1.
https://eprints.bournemouth.ac.uk/32113/
Source: Manual
An investigation of the thermal stability of an Mg-Dy alloy after processing by high-pressure torsion
Authors: Hanna, A., Azzeddine, H., Huang, Y., Bradai, D., Cabrera, J.M. and Langdon, T.G.
Journal: Materials characterization
Volume: 151
Issue: May
Pages: 519-529
ISSN: 1044-5803
Abstract:An Mg-0.41Dy (wt%) alloy was successfully processed by high-pressure tension (HPT) through 5 turns at room temperature. The evolution of the recrystallization microstructure and the texture and mechanical properties of the deformed alloy were investigated after annealing at 200 and 400 °C for 1 h using Electron Backscatter Diffraction (EBSD) and Vickers measurements. The recrystallization temperature and activation energy were evaluated using Differential Scanning Calorimetry (DSC). Processing by HPT led to significant grain refinement with an average grain size of ~0.5 ± 0.1 μm which increased to ~1.2 ± 0.8 μm after annealing at 400 °C. This slow increase in grain size at a high temperature demonstrates a good thermal stability of the microstructure. The alloy exhibited two main fiber textures after HPT processing: firstly a typical basal fiber (φ1 = 0–360°, Φ = 0° and φ2 = 0–60°) and secondly a fiber localized at φ1 = 180°, Φ = 60° and φ2 = 0–90°. These textures were retained after annealing at 400 °C. There was no change in the microhardness value after annealing at 200 °C (41 ± 1 Hv) and only a minor decrease after annealing at 400 °C (38.4 ± 0.5 Hv). The DSC results showed that the temperature associated with the recrystallization process increased with increasing heating rate and the activation energy for recrystallization was measured as ~25 kJ mol−1.
https://eprints.bournemouth.ac.uk/32113/
Source: BURO EPrints