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

Celik, Ozgur; Baydoğan, Murat; Atar, Erdem; Kayali, E.; Çimenoğlu, Hüseyin

doi:10.1016/j.msea.2012.11.122

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, cilt.565, ss.38-43, 2013 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 565
Basım Tarihi: 2013
Doi Numarası: 10.1016/j.msea.2012.11.122
Dergi Adı: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.38-43
Anahtar Kelimeler: Austenite, Fatigue, Hardness, Mechanical characterization, Residual stresses, Steel, NITROGEN, CARBON, 316L, INDENTATION, DIFFUSION, BEHAVIOR, ALLOYS, STRESS
İstanbul Teknik Üniversitesi Adresli: Evet

Özet

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.