Superplastic deformation behavior and hot-processing map of the TiNp/2014 Al composite
| Autor: | Xinyun Wang, Hui-E. Hu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Metallurgy Composite number Metals and Alloys Superplasticity 02 engineering and technology Activation energy Dissipation 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Mechanics of Materials 0103 physical sciences Ultimate tensile strength Solid mechanics Materials Chemistry Elongation Composite material 0210 nano-technology |
| Zdroj: | Metals and Materials International. 22:41-49 |
| ISSN: | 2005-4149 1598-9623 |
| DOI: | 10.1007/s12540-015-5226-8 |
| Popis: | The superplastic deformation behavior and hot-processing map of the TiNp/2014 Al composite were investigated based on tensile tests conducted at various temperatures (773 K, 798 K, and 818 K) with various strain rates (0.033, 0.167, 0.33, and 0.67 s-1). The results revealed that the influence of strain on the energy dissipation map is negligible. The optimal superplastic deformation parameters corresponding to the peak power dissipation efficiency of 0.65 differ from those corresponding to the maximum elongation of 351%. For the superplastic deformation of TiNp/2014 composite, the deformation activation energy is much higher than that for the lattice self-diffusion in pure aluminum, which can be explained by the combination of mechanisms including grain (subgrain) boundary sliding accommodation, interface sliding accommodation, liquid-phase helper accommodation and load transfer. To avoid voids and wedge cracks, two obvious instability domains in the hot-processing maps should be avoided. The hot-processing maps obtained can approximately, but not accurately enough, optimize superplastic deformation parameters of the TiNp/2014 Al composite. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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