Microstructure and Texture Evolution of Repetitive Upsetting-Extruded (RUEed) Mg-Gd-Y-Zn-Zr Alloy after Hot Compression

Abstract:

In order to determine the deformation temperature of next pass, the hot compression tests were performed by Gleeble-3800 at different temperature form 380 to 420 °C. The microstructure and texture evolution of repetitive upsetting-extruded (RUEed) Mg-Gd-Y-Zn-Zr alloy during hot compression were studied by electron backscattering diffraction (EBSD) analysis. The results showed that the dynamic recrystallization (DRX) occured during the hot compression processing from the strain-stress flow curves. When the temperature increased to 420 °C, the average grain size reduced to 6.64 μm, and the volume fraction of DRXed grains increased to 81.5%. All the compressed alloys exhibited a typical compression texture, the maximum texture intensity of {0001} plane gradually decreased with increasing temperature. When the compression temperature was up to 420°C, the the maximum texture intensity of {0001} plane was 3.207 due to the effect of DRXed grains. Finally, 420°C is chosen as the next deformation of next pass because of the more precipitation and DRXed grains.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 63-71
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.63
• Online since: June 2021
• Authors: Bei Bei Dong, Zhi Min Zhang*, Jian Min Yu, Xin Che
• Keywords: Compression Tests, Deformation Temperature, Dynamic Recrystallization (DRX), Mg-Gd-Y-Zn-Zr Alloy

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