Evaluation of Thermal Stability and Its Effect on the Corrosion Behaviour of Mg-RE Alloys Processed by High-Pressure Torsion
Authors: Azzeddine, H., Hanna, A., Dakhouche, A., Baudin, T., Brisset, F., Huang, Y. and Langdon, T.G.
Journal: Crystals
Volume: 13
Issue: 4
eISSN: 2073-4352
DOI: 10.3390/cryst13040662
Abstract:The evolutions of microstructure and texture and the corrosion behaviour of low light rare-earth containing Mg-1.4Nd and low heavy rare-earth containing Mg-0.6Gd and Mg-0.4Dy (wt.%) were evaluated and compared after processing by high-pressure torsion (HPT) and isochronal annealing at 250 and 450 °C for 1 h using electron backscatter diffraction (EBSD) and electrochemical tests in a 3.5% (wt.%) NaCl solution. The EBSD results show that dynamic recrystallisation (DRX) was restricted in the Mg-1.4Nd alloy which led to a heterogenous deformation microstructure whereas the Mg-0.6Gd and Mg-0.4Dy alloys exhibited a homogenous deformation microstructure formed mostly of equiaxed dynamically recrystallised DRX grains. The HPT processing caused the development of a deviated basal texture in the three alloys. A good thermal stability of the three alloys was noticed after annealing at 250 °C. By contrast, annealing at 450 °C led to a homogenous equiaxed microstructure and weakening of texture for the Mg-1.4Nd alloy and a heterogenous bimodal microstructure with a stable basal texture for the Mg-0.6Gd and Mg-0.4Dy alloys. The HPT-processed Mg–RE alloys exhibited an improved corrosion resistance due to grain refinement. Thereafter, the corrosion resistance of the Mg-0.6Gd and Mg-0.4Dy alloys decreased with increasing annealing temperature due to an increase in grain size while the corrosion resistance of the Mg-1.4Nd alloy was improved after annealing at 450 °C due to precipitation and texture weakening.
https://eprints.bournemouth.ac.uk/38425/
Source: Scopus
Evaluation of Thermal Stability and Its Effect on the Corrosion Behaviour of Mg-RE Alloys Processed by High-Pressure Torsion
Authors: Azzeddine, H., Hanna, A., Dakhouche, A., Baudin, T., Brisset, F., Huang, Y. and Langdon, T.G.
Journal: CRYSTALS
Volume: 13
Issue: 4
eISSN: 2073-4352
DOI: 10.3390/cryst13040662
https://eprints.bournemouth.ac.uk/38425/
Source: Web of Science (Lite)
Evaluation of thermal stability and its effect on the corrosion behaviour of Mg-RE alloys processed by high-pressure torsion
Authors: Azzeddine, H., Hanna, A., Dakhouche, A., Baudin, T., Brisset, F., Huang, Y. and Langdon, T.G.
Journal: Crystals
Volume: 13
Issue: 4
Pages: 662(1)-662(22)
Publisher: MDPI AG
ISSN: 2073-4352
DOI: 10.3390/cryst13040662
Abstract:The evolutions of microstructure and texture and the corrosion behaviour of low light rare-earth containing Mg-1.4Nd, and low heavy rare-earth containing Mg-0.6Gd and Mg-0.4Dy (wt.%) were evaluated and compared after processing by high-pressure torsion (HPT) and isochronal annealing at 250 and 450 °C for 1 h using electron backscatter diffraction (EBSD) and electrochemical tests in a 3.5% (wt.%) NaCl solution. The EBSD results show that dynamic recrystallization (DRX) was restricted in the Mg-1.4Nd alloy which led to a heterogenous deformation microstructure whereas the Mg-0.6Gd and Mg-0.4Dy alloys exhibited a homogenous deformation microstructure formed mostly of equiaxed dynamically recrystallized DRX grains. The HPT processing caused the development of a deviated basal texture in the three alloys. A good thermal stability of the three alloys was noticed after annealing at 250 °C. By contrast, annealing at 450 °C led to a homogenous equiaxed microstructure and weakening of texture for the Mg-1.4Nd alloy and a heterogenous bimodal microstructure with a stable basal texture for the Mg-0.6Gd and Mg-0.4Dy alloys. The HPT-processed Mg-RE alloys exhibited an improved corrosion resistance due to grain refinement. Thereafter, the corrosion resistance of the Mg-0.6Gd and Mg-0.4Dy alloys decreased with increasing annealing temperature due to an increase in grain size while the corrosion resistance of the Mg-1.4Nd alloy was improved after annealing at 450 °C due to precipitation and texture weakening.
https://eprints.bournemouth.ac.uk/38425/
Source: Manual
Preferred by: Yi Huang
Evaluation of thermal stability and its effect on the corrosion behaviour of Mg-RE alloys processed by high-pressure torsion
Authors: Azzeddine, H., Hanna, A., Dakhouche, A., Baudin, T., Brisset, F., Huang, Y. and Langdon, T.G.
Journal: Crystals
Volume: 13
Issue: 4
Pages: 1-20
Publisher: MDPI AG
ISSN: 2073-4352
Abstract:The evolutions of microstructure and texture and the corrosion behaviour of low light rare-earth containing Mg-1.4Nd, and low heavy rare-earth containing Mg-0.6Gd and Mg-0.4Dy (wt.%) were evaluated and compared after processing by high-pressure torsion (HPT) and isochronal annealing at 250 and 450 °C for 1 h using electron backscatter diffraction (EBSD) and electrochemical tests in a 3.5% (wt.%) NaCl solution. The EBSD results show that dynamic recrystallization (DRX) was restricted in the Mg-1.4Nd alloy which led to a heterogenous deformation microstructure whereas the Mg-0.6Gd and Mg-0.4Dy alloys exhibited a homogenous deformation microstructure formed mostly of equiaxed dynamically recrystallized DRX grains. The HPT processing caused the development of a deviated basal texture in the three alloys. A good thermal stability of the three alloys was noticed after annealing at 250 °C. By contrast, annealing at 450 °C led to a homogenous equiaxed microstructure and weakening of texture for the Mg-1.4Nd alloy and a heterogenous bimodal microstructure with a stable basal texture for the Mg-0.6Gd and Mg-0.4Dy alloys. The HPT-processed Mg-RE alloys exhibited an improved corrosion resistance due to grain refinement. Thereafter, the corrosion resistance of the Mg-0.6Gd and Mg-0.4Dy alloys decreased with increasing annealing temperature due to an increase in grain size while the corrosion resistance of the Mg-1.4Nd alloy was improved after annealing at 450 °C due to precipitation and texture weakening.
https://eprints.bournemouth.ac.uk/38425/
Source: BURO EPrints