Hot Deformation Behavior of Homogenized Mg-13.5Gd-3.2Y-2.3Zn-0.5Zr Alloy via Hot Compression Tests
| Autor: | Guanshi Zhang, Luying Ren, Yiding Wang, Zhimin Zhang, Zhaoming Yan, Yue Du, Jiaxuan Zhu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
DRX Alloy 02 engineering and technology engineering.material lcsh:Technology 01 natural sciences Article Mg-Gd-Y-Zn-Zr alloy hot deformation behavior Stress (mechanics) 0103 physical sciences General Materials Science Composite material lcsh:Microscopy lcsh:QC120-168.85 010302 applied physics lcsh:QH201-278.5 lcsh:T Strain rate Atmospheric temperature range 021001 nanoscience & nanotechnology Compression (physics) Microstructure processing map lcsh:TA1-2040 engineering Dynamic recrystallization lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Deformation (engineering) lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 constitutive equation |
| Zdroj: | Materials Volume 11 Issue 11 Materials, Vol 11, Iss 11, p 2282 (2018) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma11112282 |
| Popis: | Mg-Gd-Y-Zn-Zr Mg alloys show excellent performance in high-end manufacturing due to its strength, hardness and corrosion resistance. However, the hot deformation and dynamic recrystallization (DRX) behaviors of Mg-13.5Gd-3.2Y-2.3Zn-0.5Zr were not studied. For this article, hot compression behavior of homogenized high rare-earth (RE) content Mg-13.5Gd-3.2Y-2.3Zn-0.5Zr (wt%) alloy was investigated by using the Gleeble-3500D thermo-simulation test machine under the temperature of 350&ndash 500 ° C and the strain rate of 0.001&ndash 1 s&minus 1. It was found that the high flow stress corresponded to the low temperature and high strain rate, which showed DRX steady state curve during the hot compression. The hot deformation average activation was 263.17 kJ/mol, which was obtained by the analysis of the hyperbolic constitutive equation and the Zener-Hollomon parameter. From observation of the microstructure, it was found that kink deformation of long period stacking ordered (LPSO) phase was one of the important coordination mechanisms of hot deformation at low temperature. The processing map with the strain of 0.5 was established under the basis of dynamic material model (DMM) it described two high power dissipation domains: one appearing in the temperature range of 370&ndash 440 ° C and the strain rate range of 0.001&ndash 0.006 s&minus 1, the other appearing in the temperature range of 465&ndash C and strain rate range of 0.001&ndash 0.05 s&minus 1, in which dynamic recrystallization (DRX) mainly ocurred. The highest degree of DRX was 18% from the observation of the metallographic. |
| Databáze: | OpenAIRE |
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