Morphology change of retained austenite during austempering of carbide-free bainitic steel
| Autor: | Sophie Primig, Florian Winkelhofer, Christina Hofer, Helmut Clemens |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Austenite Morphology (linguistics) Materials science Bainite Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Homogeneous distribution Carbide law.invention Mechanics of Materials law 0103 physical sciences General Materials Science sense organs Electron microscope skin and connective tissue diseases 0210 nano-technology Austempering |
| Zdroj: | Materials Science and Engineering: A. 664:236-246 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2016.04.005 |
| Popis: | A change in the mechanical properties of a carbide-free bainitic steel was observed during prolonged holding at austempering temperature after termination of the bainitic transformation. To determine the origin of the property change, the microstructure was investigated by correlative electron microscopy. Although the retained austenite content remains the same during prolonged holding, its morphology changes from thin films separating the individual bainitic sub-units to a more globular structure. Since films of austenite contain a higher C concentration, the blocky austenite becomes gradually enriched in C during this morphology change. The more homogeneous distribution of the C after prolonged austempering leads to higher deformability as a result of a more pronounced TRIP effect. |
| Databáze: | OpenAIRE |
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