Effect of Mn Addition on Mechanical Property and Corrosion Behavior in Hot Rolled 19 % Cr Duplex Stainless Steel

Abstract:

The effect of Mn addition on mechanical property and corrosion behavior of hot rolled 19 % Cr duplex stainless steel was investigated. The ultimate tensile strength of specimen decreased from 950 to 840 MPa with increasing Mn content from 3.6 to 5.5 wt.%, and further decreased to 768MPa with Mn content addition up to 8.1 wt.%. The sample with the addition of 5.5 wt.% Mn exhibited the highest elongation up to 43%. The polarization result revealed that higher value of breakdown potentials E_b was obtained with increasing Mn content from 3.6 to 5.5 wt. %, but which decreased with increasing Mn content to 8.1 wt.%. The electrochemical impedance spectroscopy (EIS) spectra showed higher corrosion prevention capability was obtained due to enhancement of polarization resistance with increasing Mn content from 3.6 to 5.5 wt.%.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 231-234
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.231
• Online since: August 2014
• Authors: Yin Hui Yang*, Yang Gu
• Keywords: Corrosion, Duplex Stainless Steel, Mechanical Property, Mn Content

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