Effect of Multipass Friction Stir Processing on Mechanical and Corrosion Behavior of 2507 Super Duplex Stainless Steel

被引：0
|
作者：
M. K. Mishra
G. Gunasekaran
A. G. Rao
B. P. Kashyap
N. Prabhu
机构：
[1] Indian Institute of Technology Bombay,Department of Metallurgical Engineering and Materials Science
[2] Naval Materials Research Laboratory,undefined
来源：
Journal of Materials Engineering and Performance | 2017年 / 26卷
关键词：
electrochemical impedance spectroscopy; FSP; mechanical properties; passive film; polarization; super duplex stainless steel;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The microstructure, mechanical properties, and corrosion behavior of 2507 super duplex stainless steel after multipass friction stir processing (FSP) were examined. A significant refinement in grain size of both ferrite and austenite was observed in stir zone resulting in improved yield and tensile strength. Electrochemical impedance spectroscopy and anodic polarization studies in 3.5 wt.% NaCl solution showed nobler corrosion characteristics with increasing number of FSP passes. This was evident from the decrease in corrosion current density, decrease in passive current density, and increase in polarization resistance. Also, the decrease in density of defects, based on Mott-Schottky analysis, further confirms the improvement in corrosion resistance of 2507 super duplex stainless steel after multipass FSP.
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页码：849 / 860
页数：11
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