Wear and Corrosion Resistances of Active Screen Plasma-Nitrided Duplex Stainless Steels

Journal Article · Sat Jun 15 04:00:00 EDT 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-019-04114-Y· OSTI ID:22970729

Pintaude, Giuseppe; Rovani, Ane C.; Neves, Julio C. Klein das ^[1]; Lagoeiro, Leonardo E. ^[2]; Li, Xiaoying; Dong, Hanshan S. ^[3]

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1. Federal University of Technology - Paraná, Surface and Contact Lab (LASC) (Brazil)
2. Federal University of Paraná, Earth Science Department (Brazil)
3. The University of Birmingham, School of Metallurgy and Materials (United Kingdom)

Two grades of duplex stainless steel, SAF 2205 and SAF 2507, were nitrided using an active screen plasma process carried out at 380 °C for 10 h and were characterized in terms of microstructure and hardness. Wear resistance was assessed by means of linear scratch tests, using loads below and above the critical load. Potentiodynamic polarization was used to analyze corrosion behavior in 0.6 M NaCl solution. X-ray diffractometry showed expanded austenite formation in all nitrided samples. The super duplex steel SAF 2507 showed much better scratch resistance, with low friction coefficient and greater toughness, as judged by the pattern of superficial cracks when it was tested above the critical load. The corrosion behavior of steels was also different, mainly in the active region, and nitriding had a more beneficial effect upon SAF 2507. The potential relative to the transpassive region was practically unaffected by the nitriding.

• OSTI ID: 22970729
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 6 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CORROSION RESISTANCE
CRYSTAL LATTICES
FRICTION FACTOR
SCREENS
SODIUM CHLORIDES
STAINLESS STEELS
WEAR RESISTANCE
X-RAY DIFFRACTION