Study of the heat transfer coefficient of a nickel-based superalloy in the end-quench test with air
| Autor: | Pei Fu, Yan-po Song, Zaiwang Huang, Ping Zhou, Tian-yang Zhao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Work (thermodynamics)
Materials science 020209 energy Airflow General Engineering Thermodynamics chemistry.chemical_element 02 engineering and technology Heat transfer coefficient Condensed Matter Physics 01 natural sciences Heat capacity 010305 fluids & plasmas Volumetric flow rate Superalloy Nickel chemistry 0103 physical sciences Heat transfer 0202 electrical engineering electronic engineering information engineering |
| Zdroj: | International Journal of Thermal Sciences. 155:106416 |
| ISSN: | 1290-0729 |
| DOI: | 10.1016/j.ijthermalsci.2020.106416 |
| Popis: | The microstructural and mechanical properties of metal materials are affected by the cooling rate during the heat treatment. The temperature distribution and the corresponding cooling rate are determined by the heat transfer coefficient. To study the heat transfer coefficient of an advanced nickel-based superalloy during the end-quench process with air, the experimental and fluid-solid coupling numerical studies were conducted in this work. Furthermore, the apparent specific heat capacity associated with the cooling rate was applied to address the effect of phase transformation in the nickel-based superalloy. The results showed that the heat transfer coefficient at the quenched end reached over 400 W/(m2·K) at 800 K when the air flow was 2.7 m3/h because of the combination of a strong impinging jet and radiation heat transfer. Based on the simulation results, an empirical correlation among the heat transfer coefficient at the quenched end, the temperature and the flow rate of the air was proposed. The validity of the heat transfer coefficient model was verified by the temperature curves obtained in the experiment. |
| Databáze: | OpenAIRE |
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