Gradient temperature heat treatment for efficient study of phase precipitation in a high-temperature Fe-Cr-Mo ferritic steel
| Autor: | Changdong Wei, Ji-Cheng Zhao |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Precipitation (chemistry) Metallurgy 02 engineering and technology Laves phase 021001 nanoscience & nanotechnology Steel bar Microstructure 01 natural sciences Indentation hardness Temperature gradient Phase (matter) 0103 physical sciences General Materials Science Tube furnace 0210 nano-technology |
| Zdroj: | Materialia. 3:31-40 |
| ISSN: | 2589-1529 |
| Popis: | An easy-to-implement gradient temperature heat treatment process was developed to effectively study the phase precipitation in a Fe-Cr-Mo high-temperature ferritic steel over a wide range of temperatures. The natural temperature gradient across a Fe-Cr-Mo steel bar that was placed at an open-end of a tube furnace led to microstructure variations and hardness changes as a result of the difference in phase precipitation. SEM and TEM characterizations showed that the Chi-phase was the dominant phase at temperatures higher than 785 °C and a metastable Laves phase precipitated prior to the Chi-phase at temperatures below 785 °C. Vickers microhardness was measured at locations across the steel bar, and the Ashby-Orowan equation was found to hold well in correlating the microhardness values to the average particle size and inter-particle spacing obtained from quantitative image analysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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