Thermal Behavior of Ti-64 Primary Material in Electron Beam Melting Process
| Autor: | Jean-Sébastien Kroll-Rabotin, Alain Jardy, Jean-Pierre Bellot, Julien Jourdan, Thibault Quatravaux |
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| Přispěvatelé: | Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
electron beam Materials science melting 0211 other engineering and technologies Vacuum arc remelting Overheating (economics) 02 engineering and technology 7. Clean energy melting temperature Article [SPI.MAT]Engineering Sciences [physics]/Materials [SPI]Engineering Sciences [physics] Thermal Emissivity General Materials Science Composite material Dissolution 021102 mining & metallurgy Microscopy QC120-168.85 QH201-278.5 Titanium alloy 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) TK1-9971 Temperature gradient Descriptive and experimental mechanics 13. Climate action numerical simulation Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology Bar (unit) |
| Zdroj: | Materials Materials, MDPI, 2021, 14 (11), pp.2853. ⟨10.3390/ma14112853⟩ Materials, Vol 14, Iss 2853, p 2853 (2021) Volume 14 Issue 11 |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14112853⟩ |
| Popis: | International audience; The Electron Beam Melting (EBM) process has emerged as either an alternative or a complement to vacuum arc remelting of titanium alloys, since it is capable of enhancing the removal of exogenous inclusions by dissolution or sedimentation. The melting of the primary material is a first step of this continuous process, which has not been studied so far and is investigated experimentally and numerically in the present study. Experiments have been set up in a 100 kW laboratory furnace with the aim of analyzing the effect of melting rate on surface temperature of Ti-64 bars. It was found that melting rate is nearly proportional to the EB power while the overheating temperature remains roughly independent of the melting rate and equal to about 100 °C. The emissivity of molten Ti-64 was found to be 0.22 at an average temperature of about 1760 °C at the tip of the bar. In parallel, a mathematical model of the thermal behavior of the material during melting has been developed. The simulations revealed valuable results about the melting rate, global heat balance and thermal gradient throughout the bar, which agreed with the experimental values to a good extent. The modeling confirms that the overheating temperature of the tip of the material is nearly independent of the melting rate. |
| Databáze: | OpenAIRE |
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