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Surface Engineering and Applied Electrochemistry

, Volume 54, Issue 5, pp 508–517 | Cite as

The Effect of Time and Temperature of Nitridation-Oxidation Process on Properties and Corrosion Resistance of AISI 316L Steel

  • Milad Yazdkhasti
  • Sayed Ahmad Hosseini
  • Hamidreza Javadinejad
  • Hossein Zare
  • Mohsen Saboktakin RiziEmail author
  • Hamidreza Abedi
Article
  • 4 Downloads

Abstract

In this research, AISI 316L austenitic stainless steel has been subjected to plasma nitriding and oxidation- nitridation heat treatment at several temperatures for different times. Plasma nitriding of the samples was performed in N2/H2 = 1/3 atmosphere at temperatures of 425, 450, and 475°C for 5 h. To study the effects of the combined nitridation-oxidation process on mechanical and physical properties, the samples have been exposed in O2/H2 = 1/5 oxidating atmosphere at 425, 450, and 500°C for 15, 30, and 60 min, respectively. The mechanical and physical properties of the samples were studied after nitridation-oxidation heat treatment. The microstructural properties were examined by optical microscopy and scanning electron microscopy; the phases were analyzed by X-ray diffraction. The wear behavior of the oxidized-nitrided samples was studied using pin-on-disk tribotesting. The hardness and depth of the nitrided layer were measured by a Vickers hardness tester. The corrosion resistance of both untreated and treated samples was tested by the Tafel polarization and potentiodynamic polarization in 3.5% NaCl solution at ambient temperature. The results indicate that the combined nitridation-oxidation heat treatment improves both the pitting corrosion and wear resistances of AISI 316L steel and further increases its hardness.

Keywords

AISI 316L austenitic stainless steel plasma nitriding combined nitridation-oxidation heat treatment wear resistance 

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Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  • Milad Yazdkhasti
    • 1
  • Sayed Ahmad Hosseini
    • 2
  • Hamidreza Javadinejad
    • 1
  • Hossein Zare
    • 1
  • Mohsen Saboktakin Rizi
    • 1
    Email author
  • Hamidreza Abedi
    • 3
  1. 1.Department of Industrial Engineering, Lenjan BranchIslamic Azad UniversityIsfahanIran
  2. 2.University of Applied Sciences and Technology (UAST)ShahrekordIran
  3. 3.Department of Materials EngineeringIsfahan University of TechnologyIsfahanIran

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