Deformation mechanisms of a modified 316L austenitic steel subjected to high pressure torsion
| Autor: | Stephan Scheriau, R. Pippan, Siegfried Kleber, Zaoli Zhang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Austenite
Materials science Mechanical Engineering Metallurgy Torsion (mechanics) engineering.material Atmospheric temperature range Condensed Matter Physics Nanocrystalline material Deformation mechanism Mechanics of Materials Stacking-fault energy engineering General Materials Science Composite material Austenitic stainless steel Crystal twinning |
| Zdroj: | Materials Science and Engineering: A. 528:2776-2786 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2010.12.023 |
| Popis: | The present work is assigned to the microstructural evolution of a modified 316L stainless steel during high pressure torsion (HPT) in a temperature range between −196 °C and 720 °C. The aspect of microstructural evolution is similar to that of materials with low stacking fault energy: at high deformation temperatures (Tdef > 450 °C) the dominant deformation mechanism is dislocation glide whereas for medium temperatures (450 °C > Tdef > 20 °C) mechanical twinning is observed. At very low deformation temperatures (20 °C > Tdef > −196 °C) mechanical twinning is replaced by the deformation induced martensite transformation γ(fcc) → ɛ(hcp). Based on the present results, the formation mechanisms of nanocrystalline austenite are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect