Fatigue performance of low temperature nitrided AISI 321 grade austenitic stainless steel

This study aims to present the effect of low temperature nitriding on the fatigue behavior of a titanium stabilized AISI 321 grade austenitic stainless steel. Upon nitriding at 420°C in a fluidized bed reactor, the surfaces of the samples were covered with hybrid expanded austenite layer composed of...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2013-03, Vol.565, p.38-43
Main Authors: Celik, Ozgur, Baydogan, Murat, Atar, Erdem, Kayali, E. Sabri, Cimenoglu, Huseyin
Format: Article
Language:English
Subjects:
Applied sciences
Austenite
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fatigue
Hardness
Heat treatment
Materials science
Mechanical characterization
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Physics
Production techniques
Residual stresses
Steel
Surface treatments
Thermochemical treatment and diffusion treatment
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Summary:This study aims to present the effect of low temperature nitriding on the fatigue behavior of a titanium stabilized AISI 321 grade austenitic stainless steel. Upon nitriding at 420°C in a fluidized bed reactor, the surfaces of the samples were covered with hybrid expanded austenite layer composed of nitrogen and carbon enriched zones. This surface layer combined the superior hardness (>1500HV) and compressive residual stress (−6.8GPa) without sacrificing the ductility to enhance the fatigue limit of the AISI 321 grade austenitic stainless steel about 15% in comparison to as-received state.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2012.11.122