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. °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.
| Original language | English |
|---|---|
| Pages (from-to) | 38-43 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering: A |
| Volume | 565 |
| DOIs | |
| Publication status | Published - 10 Mar 2013 |
Funding
This study was funded by The Scientific and Technological Research Council of Turkey via 107M409 project and Department of Scientific Research Projects of Istanbul Technical University. The authors would like to thank Prof. Dr. Mustafa URGEN for XRD and GDOS analyses and to Mr. Hasan CEP for the design of fluidized bed reactor manufactured by Alper Heat Treatment Ind. & Trade Co.
| Funders | Funder number |
|---|---|
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu | 107M409 |
| Istanbul Teknik Üniversitesi |
Keywords
- Austenite
- Fatigue
- Hardness
- Mechanical characterization
- Residual stresses
- Steel