Mechanical properties and corrosion behaviour of developed high nitrogen high manganese stainless steelsMechanische Eigenschaften und Korrosionsverhalten von entwickelten Edelstahlen mit hohem Stickstoffgehalt und hohem Mangangehalt

Influence of composition, specifically manganese and nitrogen content, on the microstructure associated corrosion resistance property of newly developed stainless steel has been studied. The developed steels have been characterised for their microstructure, mechanical and electrochemical properties. The results indicate that the addition of manganese and nitrogen as a substitute for nickel favours the austenite microstructure, higher yield strength (>350 MPa), tensile strength (>700 MPa), elongation and superior Charpy V-notch impact toughness properties. The results obtained from electrochemical tests such as potentiodynamic polarisation and electrochemical impedance spectroscopy of manganese stainless steel show remarkable improvement (about 4 times) in corrosion resistance exhibiting passivity behaviour like that of commercial stainless steel (316L).

Automated summary

The influence of composition, specifically manganese and nitrogen content, on the microstructure and corrosion resistance property of newly developed stainless steel has been studied. The addition of manganese and nitrogen as a substitute for nickel favors the austenite microstructure and improves the mechanical properties. Electrochemical tests show remarkable improvement in corrosion resistance with manganese stainless steel exhibiting passivity behavior similar to commercial stainless steel.