Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy
The microstructure and microtexture of an extruded and annealed GWZ (Mg-8.2Gd-3.6Y-1.6Zn-0.5Zr, wt.%) magnesium alloy was recorded strain by strain in the course of thermomechanical processing. The specimens were compressed down to various interruption strains of 0.1, 0.3, and 0.5 under the strain r...
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| Format: | Article |
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Elsevier
2022-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422002927 |
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| author | Z. Aalipour A. Zarei-Hanzaki A. Moshiri H.R. Abedi Daudi Waryoba A. Kisko L.P. Karjalainen |
| author_facet | Z. Aalipour A. Zarei-Hanzaki A. Moshiri H.R. Abedi Daudi Waryoba A. Kisko L.P. Karjalainen |
| author_sort | Z. Aalipour |
| collection | DOAJ |
| description | The microstructure and microtexture of an extruded and annealed GWZ (Mg-8.2Gd-3.6Y-1.6Zn-0.5Zr, wt.%) magnesium alloy was recorded strain by strain in the course of thermomechanical processing. The specimens were compressed down to various interruption strains of 0.1, 0.3, and 0.5 under the strain rate of 0.001 s−1 at 400 °C, the temperature at which the material was capable to be recrystallized extensively. Appreciable refinement was recognized even at low imposed compressive strain of 0.1, and the recrystallization process was completed at true strain 0.3 where the mean grain size of 4.3 μm was attained. The LPSO stimulated nucleation (LSN) and conventional continuous dynamic recrystallization (CDRX) mechanism were contributed in grain refinement. Consequently, the initial basal texture was considerably weakened which was mainly ascribed to the formation of RE-texture components. At higher imposed strain of 0.5, the majority of grains were found in deformed states, the capability of strain softening was decreased and the microtexture only changed in respect of intensity compared with true strain of 0.3. These indicated that the imposed strain was mainly accommodated through dislocation multiplication and tangling within the previously recrystallized grains. Complementary, the slip/twin activity, and the sequence of strain accommodation was investigated through Schmid analysis of the various systems. |
| first_indexed | 2024-12-11T11:03:43Z |
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| id | doaj.art-6ffc48cd95f840f39e94731969c57eba |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-11T11:03:43Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6ffc48cd95f840f39e94731969c57eba2022-12-22T01:09:47ZengElsevierJournal of Materials Research and Technology2238-78542022-05-0118591598Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloyZ. Aalipour0A. Zarei-Hanzaki1A. Moshiri2H.R. Abedi3Daudi Waryoba4A. Kisko5L.P. Karjalainen6Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, IranHot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran; Corresponding author.Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, IranSchool of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran; Corresponding author.Engineering, Applied Materials, Penn State University, College Place, DuBois, PA, 15801, USACentre for Advanced Steels Research, Materials and Production Engineering Unit, University of Oulu, Oulu, FinlandCentre for Advanced Steels Research, Materials and Production Engineering Unit, University of Oulu, Oulu, FinlandThe microstructure and microtexture of an extruded and annealed GWZ (Mg-8.2Gd-3.6Y-1.6Zn-0.5Zr, wt.%) magnesium alloy was recorded strain by strain in the course of thermomechanical processing. The specimens were compressed down to various interruption strains of 0.1, 0.3, and 0.5 under the strain rate of 0.001 s−1 at 400 °C, the temperature at which the material was capable to be recrystallized extensively. Appreciable refinement was recognized even at low imposed compressive strain of 0.1, and the recrystallization process was completed at true strain 0.3 where the mean grain size of 4.3 μm was attained. The LPSO stimulated nucleation (LSN) and conventional continuous dynamic recrystallization (CDRX) mechanism were contributed in grain refinement. Consequently, the initial basal texture was considerably weakened which was mainly ascribed to the formation of RE-texture components. At higher imposed strain of 0.5, the majority of grains were found in deformed states, the capability of strain softening was decreased and the microtexture only changed in respect of intensity compared with true strain of 0.3. These indicated that the imposed strain was mainly accommodated through dislocation multiplication and tangling within the previously recrystallized grains. Complementary, the slip/twin activity, and the sequence of strain accommodation was investigated through Schmid analysis of the various systems.http://www.sciencedirect.com/science/article/pii/S2238785422002927GWZ magnesium alloysLPSODynamic recrystallizationThermomechanical processingMicrotexture |
| spellingShingle | Z. Aalipour A. Zarei-Hanzaki A. Moshiri H.R. Abedi Daudi Waryoba A. Kisko L.P. Karjalainen Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy Journal of Materials Research and Technology GWZ magnesium alloys LPSO Dynamic recrystallization Thermomechanical processing Microtexture |
| title | Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy |
| title_full | Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy |
| title_fullStr | Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy |
| title_full_unstemmed | Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy |
| title_short | Strain dependency of dynamic recrystallization during thermomechanical processing of Mg-Gd-Y-Zn-Zr alloy |
| title_sort | strain dependency of dynamic recrystallization during thermomechanical processing of mg gd y zn zr alloy |
| topic | GWZ magnesium alloys LPSO Dynamic recrystallization Thermomechanical processing Microtexture |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422002927 |
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