Inhomogeneous microstructure and properties along the thickness of stir zone in friction stir welded SAF 2507 super duplex stainless steel joint

2022 ◽  
Vol 73 ◽  
pp. 611-623
Author(s):  
Fujun Cao ◽  
Guoqiang Huang ◽  
Wei Guan ◽  
Wentao Hou ◽  
Ruiyang Ni ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Stir Zone ◽  
Super Duplex Stainless Steel ◽  
Friction Stir ◽  
Microstructure And Properties ◽  
Steel Joint ◽  
Inhomogeneous Microstructure

Surface Characterization of Incoloy 825 Ni-Based Alloy/2507 Super Duplex Stainless Steel Dissimilar Friction Stir Welds

CORROSION ◽  
10.5006/2755 ◽  
2018 ◽  
Vol 74 (11) ◽  
pp. 1259-1271 ◽  
Author(s):  
Jalal Kangazian ◽  
Morteza Shamanian ◽  
Ali Ashrafi
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Surface Characterization ◽  
Electrochemical Impedance ◽  
Friction Stir Weld ◽  
General Corrosion ◽  
Super Duplex Stainless Steel ◽  
Friction Stir ◽  
Surface Corrosion ◽  
Incoloy 825

Surface features of a dissimilar friction stir weld between Incoloy 825 Ni-based alloy and SAF 2507 super duplex stainless steel were investigated using scanning electron microscopy, microhardness test, cyclic potentiodynamic polarization, and electrochemical impedance spectroscopy. The surface of the weldment showed lower general corrosion resistance in comparison to the base metals. Areas under the weld shoulder exhibited weak pitting resistance because of the deformed structure and/or chromium nitride precipitates. Incoloy 825 located under the shoulder also displayed the highest susceptibility to pit growth because of the austenite matrix containing titanium nitride phases. Overall, the obtained results demonstrated that the friction stir welding method could significantly deteriorate the surface corrosion behavior of the processed regions.

scholarly journals Microstructure and mechanical properties of friction stir welded 8 mm pipe SAF 2507 super duplex stainless steel

2019 ◽  
Vol 8 (1) ◽  
pp. 243-249 ◽  
Author(s):  
Rafael Arthur Reghine Giorjão ◽  
Victor Ferrinho Pereira ◽  
Maysa Terada ◽  
Eduardo Bertoni da Fonseca ◽  
Ricardo Reppold Marinho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Super Duplex Stainless Steel ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties
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