Microstructure and mechanical characterization of rapidly solidified Cr-C tool steel: Annealing effects
| Autor: | Andre Phillion, P. Delshad Khatibi, Hani Henein |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Austenite Supersaturation Materials science Annealing (metallurgy) General Chemical Engineering Metallurgy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Indentation hardness Mechanics of Materials 0103 physical sciences Tool steel engineering 0210 nano-technology Supercooling Eutectic system |
| Zdroj: | Advanced Powder Technology. 27:2076-2083 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2016.07.019 |
| Popis: | The effect of isochronal annealing on D2 tool steel powder, rapidly solidified via both Impulse Atomization and Water Atomization, has been evaluated using high-resolution scanning electron microscopy and Vickers microhardness. The amount of supersaturation of the alloying elements inside the retained austenite phase as a function of eutectic undercooling was calculated. The fraction of austenite transformed to ferrite at different annealing temperatures (from 350 °C to 810 °C) was also determined, using Rietveld analysis. The results show that although the particles with larger eutectic undercooling have larger supersaturation of alloying elements within the retained austenite phase, they have a smaller fraction of austenite to ferrite transformation at the temperature in which transformation starts. The maximum hardness was achieved at an annealing temperature of 550 °C, due to the formation of fine and well-distributed carbides. |
| Databáze: | OpenAIRE |
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