Temperature Effects on the Microstructures of Mg–Gd–Y Alloy Processed by Multi-direction Impact Forging
| Autor: | S. S. A. Shah, D. Wu, R. S. Chen, G. S. Song |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Metals and Alloys Y alloy Recrystallization (metallurgy) 02 engineering and technology Atmospheric temperature range Strain rate 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Forging 0103 physical sciences Dynamic recrystallization Grain boundary Composite material 0210 nano-technology Crystal twinning |
| Zdroj: | Acta Metallurgica Sinica (English Letters). 33:243-251 |
| ISSN: | 2194-1289 1006-7191 |
| DOI: | 10.1007/s40195-019-00972-6 |
| Popis: | A high strain rate multi-directional impact forging (MDIF) was applied to a solutionized Mg–Gd–Y–Zr alloy in the temperature range of 350–500 °C. Results demonstrate that the dominant deformation mode is twinning at a temperature below 400 °C, whereas at a medium temperature of 450 °C considerable continuous dynamic recrystallization was promoted by {10–12} extension twins. At a higher temperature of 500 °C, twinning activation was suppressed. New DRX grains were observed but their sizes were much bigger than those resulting from the MDIFed 50 passes at 450 °C, which are ascribed to the larger grain boundary mobility and atomic diffusion at 500 °C. Moreover, a non-basal weak texture was gained afterward MDIF at each temperature, which is credited to the MDIF process and the minor strain applied in each pass. |
| Databáze: | OpenAIRE |
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