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


Celik O., Baydoğan M. , Atar E., Kayali E. S. , Çimenoğlu H.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol.565, pp.38-43, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 565
  • Publication Date: 2013
  • Doi Number: 10.1016/j.msea.2012.11.122
  • Title of Journal : MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
  • Page Numbers: pp.38-43

Abstract

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 degrees 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 (> 1500 HV) and compressive residual stress (-6.8 GPa) 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. (C) 2012 Elsevier B.V. All rights reserved.