Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 529, Issue -, Pages 425-434Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.09.055
Keywords
Pulsed plasma nitriding; Stainless steel 316L; Nanoindentation; EBSD; Microanalysis; Austenite
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Funding
- Total EP Norge
- Aker Solutions
- Motech plasma Material and Overflateknologi (MOTecH)
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Pulsed plasma nitriding (PPN) treatment is one of the new processes to improve the surface hardness and tribology behavior of austenitic stainless steels. Through low temperature treatment (<440 degrees C), it is possible to obtain unique combinations of wear and corrosion properties. Such a combination is achieved through the formation of a so-called extended austenite phase. These surface layers are often also referred to as S-phase, m-phase or gamma-phase. In this work, nitrided layers on austenitic stainless steels AISI 316L (SS316L) were examined by means of a nanoindentation method at different loads. Additionally, the mechanical properties of the S-phase at different depths were studied. Electron back-scatter diffraction (EBSD) examination of the layer showed a high amount of plasticity induced in the layer during its formation. XRD results confirmed the formation of the S-phase, and no deleterious CrN phase was detected. (C) 2011 Elsevier B.V. All rights reserved.
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