Effects of nitrogen in shielding gas on microstructure evolution and localized corrosion behavior of duplex stainless steel welding joint

2017 ◽  
Vol 404 ◽  
pp. 110-128 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Hongyang Jing ◽  
Lianyong Xu ◽  
Yongdian Han ◽  
Lei Zhao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Microstructure Evolution ◽  
Localized Corrosion ◽  
Shielding Gas ◽  
Welding Joint ◽  
Stainless Steel Welding

scholarly journals Investigation on the Corrosion Behavior of Lean Duplex Stainless Steel 2404 after Aging within the 650–850 °C Temperature Range

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 529 ◽  
Author(s):  
Federica Zanotto ◽  
Vincenzo Grassi ◽  
Andrea Balbo ◽  
Fabrizio Zucchi ◽  
Cecilia Monticelli
Keyword(s):  
Stainless Steel ◽  
Grain Boundaries ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Thermal Aging ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Localized Corrosion ◽  
Fast Diffusion ◽  
Lean Duplex Stainless Steel

This paper reports the effects of thermal aging between 650 and 850 °C on the localized corrosion behavior of lean duplex stainless steel (LDSS 2404). Critical pitting temperature (CPT) and double loop electrochemical potentiokinetic reactivation (DL-EPR) tests were performed. The localization of pitting attack and intergranular corrosion (IGC) attack after DL-EPR was investigated by optical (OM) and scanning electron microscopy (SEM) and by focused ion beam (FIB) coupled to SEM. Thermal aging caused the precipitation of mainly chromium nitrides at grain boundaries. Aging at 650 °C or short aging times (5 min) at 750 °C caused nitride precipitation mainly at α/α grain boundaries as a result of fast diffusion of chromium in this phase. Aging at 850 °C or aging times from 10 to 60 min at 750 °C also allowed the precipitation at the α/γ interface. Nitrides at γ/γ grain boundaries were observed rarely and only after long aging times (60 min) at 850 °C. Electrochemical tests showed that in as-received samples, pitting attack only affected the α phase. Conversely, in aged samples, pitting and IGC attack were detected close to nitrides in correspondence of α/α and α/γ grain boundaries depending on aging temperatures and times.

Investigation on Microstructure and Impact Toughness of Different Zones in Duplex Stainless Steel Welding Joint

2016 ◽  
Vol 26 (1) ◽  
pp. 134-150 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Hongyang Jing ◽  
Lianyong Xu ◽  
Yongdian Han ◽  
Guolu Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Impact Toughness ◽  
Duplex Stainless Steel ◽  
Welding Joint ◽  
Stainless Steel Welding

A STEM Examination of the Localized Corrosion Behavior of a Duplex Stainless Steel

CORROSION ◽  
1980 ◽  
Vol 36 (5) ◽  
pp. 246-251 ◽  
Author(s):  
P. E. MANNING ◽  
C. E. LYMAN ◽  
D. J. DUQUETTE
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Localized Corrosion

The Localized Corrosion Behavior Associated with Microstructure of F53 Super Duplex Stainless Steel

2015 ◽  
Vol 53 (7) ◽  
pp. 464-473 ◽  
Author(s):  
Soon-Tae Kim ◽  
In-Sung Lee ◽  
Kyeong-Ho Kong ◽  
Yong-Soo Park ◽  
Jong-Hoon Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Localized Corrosion ◽  
Super Duplex Stainless Steel
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