Transformation characteristics of temperature and phases within Ti-6Al-4V aeroengine drum in hot forging and air cooling procedures
| Autor: | Fengping Yu, Jun Jiang, Shiyuan Luo, Jia Li, Guangming Zou, Junning Yao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
titanium alloy phase transformation Materials science Drum forging FE modeling chemistry.chemical_element 02 engineering and technology Drum 01 natural sciences Forging Biomaterials Phase (matter) 0103 physical sciences Coupling (piping) lcsh:Mining engineering. Metallurgy 010302 applied physics Air cooling Metals and Alloys Mechanics 021001 nanoscience & nanotechnology Surfaces Coatings and Films Transformation (function) chemistry Ceramics and Composites Distribution uniformity 0210 nano-technology Titanium |
| Zdroj: | Journal of Materials Research and Technology, Vol 9, Iss 4, Pp 8235-8244 (2020) |
| ISSN: | 2238-7854 |
| DOI: | 10.1016/j.jmrt.2020.05.096 |
| Popis: | The phase distribution and evolution characteristics of titanium forged parts influenced by hot forging and subsequent air cooling procedures have an essential effect on the ones of final parts, resulting in a direct impact on their ultimate mechanical properties. This study presents a simple and effective modelling approach to predict the transformation characteristics of temperature and phases during Ti-6Al-4V drum hot forging and air cooling processes. In particular, 2D FE half-symmetry models coupling with phase transformation equations are developed, and then verified by experiments. Subsequently, the distributions of temperature and phases within the forged and cooled drums are numerical investigated in details. Finally, their temperature and phase evolutions in terms of general level and distribution uniformity are analyzed quantitatively. The results indicate that the distributions of different phases within the forged and cooled drums are extremely inhomogeneous, which are related to temperature variations. Besides, the α phase distribution within the forged drum remains constant in the subsequent air cooling operation, which is related to cooling rates. |
| Databáze: | OpenAIRE |
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