Quasi-in-situ observing the rare earth texture evolution in an extruded Mg-Zn-Gd alloy with bimodal microstructure
| Autor: | H. Yan, C.S. Lao, Shigeharu Kamado, Z.W. Chen, Taiki Nakata, M.G. Jiang, Ruiyi Chen, Cheng-Yan Xu, En-Hou Han |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Annealing (metallurgy) Alloy Nucleation 02 engineering and technology engineering.material 01 natural sciences Annealing Rare earth texture 0103 physical sciences Composite material 010302 applied physics Mining engineering. Metallurgy Extrusion Metals and Alloys TN1-997 Recrystallization (metallurgy) Recrystallization 021001 nanoscience & nanotechnology Microstructure Grain growth Mechanics of Materials engineering 0210 nano-technology Magnesium alloy Electron backscatter diffraction |
| Zdroj: | Journal of Magnesium and Alloys, Vol 9, Iss 5, Pp 1797-1805 (2021) |
| ISSN: | 2213-9567 |
| Popis: | The static recrystallization and associated texture evolution were investigated in an extruded Mg-Zn-Gd alloy with bimodal microstructure based on a quasi-in-situ electron back-scatter diffraction (EBSD) method. The typical rare earth (RE) texture formed during annealing, evolving from the bimodal microstructure with [10 1 ¯ 0] basal fiber texture that consisted of fine recrystallized (RXed) grains and coarse unrecrystallized (unRXed) grains elongated along the extrusion direction. In both RXed and unRXed regions, the RXed nucleation produced randomized orientations without preferred selection and the RXed grains with RE texture orientation had more intensive growth ability than those with basal fiber orientation, thereby leading to the preferred selection of RE texture orientation during grain growth. The relationships between stored strain energy, solute drag, grain growth and texture evolution are discussed in detail. This study provided direct evidence of the RE texture evolution in an extruded Mg-RE alloy, which assists in understanding the formation mechanisms for RE texture during extrusion and better developing wrought Mg alloys with improved formability. |
| Databáze: | OpenAIRE |
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