scholarly journals Kinetics of G-phase precipitation and spinodal decomposition in very long aged ferrite of a Mo-free duplex stainless steel

2015 ◽  
Vol 465 ◽  
pp. 383-389 ◽  
Author(s):  
C. Pareige ◽  
J. Emo ◽  
S. Saillet ◽  
C. Domain ◽  
P. Pareige
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Spinodal Decomposition ◽  
Phase Precipitation ◽  
Kinetics Of

Analysis of χ phase precipitation in aged 2205 duplex stainless steel

2015 ◽  
Vol 30 (3) ◽  
pp. 591-595 ◽  
Author(s):  
Heping Liu ◽  
Hu’er Sun ◽  
Bin Liu ◽  
Dazhao Li ◽  
Fenger Sun ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Phase Precipitation ◽  
2205 Duplex Stainless Steel ◽  
Χ Phase

Influence of Sigma Phase Precipitation on Pitting Corrosion of 2507 Super-Duplex Stainless Steel

2010 ◽  
Vol 658 ◽  
pp. 380-383 ◽  
Author(s):  
Ying Han ◽  
De Ning Zou ◽  
Wei Zhang ◽  
Jun Hui Yu ◽  
Yuan Yuan Qiao
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Ambient Temperature ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Super Duplex Stainless Steel ◽  
Phase Precipitation ◽  
Pitting Potential ◽  
Σ Phase ◽  
Pitting Corrosion Resistance

Specimens of 2507 super-duplex stainless steel aging at 850°C for 5 min, 15 min and 60 min were investigated to evaluate the pitting corrosion resistance in 3.5% NaCl solution at 30°C and 50°C. The results are correlated with the microstructures obtained with different aging time. The precipitation of σ phase remarkably decreases the pitting corrosion resistance of the steel and the specimen aged for 60 min presents the lowest pitting potential at both 30°C and 50°C. With increasing the ambient temperature from 30°C to 50°C, the pitting potential exhibits a reduction tendency, while this tendency is less obviously in enhancing the ambient temperature than in extending the isothermal aging duration from 5 to 60 min. SEM analysis shows that the surrounding regions of σ phase are the preferable sites for the formation of corrosion pits which grew up subsequently. This may be attributed to the lower content of corrosion resistance elements in these regions formatted with σ phase precipitation.

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