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Effect of δ-Ferrite on the Stress Corrosion Cracking Behavior of 321 Stainless Steel

Published on Jul 1, 2019in Corrosion Science6.36
· DOI :10.1016/j.corsci.2019.07.005
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University),
Haozhan Su (SJTU: Shanghai Jiao Tong University)+ 3 AuthorsZhao Shen (SJTU: Shanghai Jiao Tong University)
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Abstract
Abstract The stress corrosion cracking behavior of 321 stainless steel has been studied in high temperature water. Analytical electron microscopy was utilized to characterize the cracking process to better understand the δ-ferrite effect. Results showed that δ-ferrite inhibited the crack growth by changing the cracking direction along the γ/δ boundary and creating a highly branched crack path. δ-ferrite was also a source of Cr to facilitate the formation of protective Cr-rich oxides at the γ/δ boundaries. Ti(CN) particles in the γ/δ boundary tended to blunt the crack tip and inhibit further oxidation, and thus impeded the total crack growth.
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References38
Newest
Published on Mar 1, 2019in Corrosion1.86
Peter L. Andresen19
Estimated H-index: 19
Stress corrosion cracking (SCC) and corrosion fatigue (CF) became a widespread issue during the industrial revolution, with several sources reporting 50,000 deaths and 2,000,000 injuries from steam boiler failures in a single year in the U.S. [1,2] While this eventually led to the development of pressure vessel and boiler codes [3] to provide design margins against overload and fatigue, even now, 165 years later, the design dodes transfer to the individual designer the job of ensuring that SCC w...
Published on Feb 1, 2019in Corrosion Science6.36
Donghai Du4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 2 AuthorsPeter L. Andresen19
Estimated H-index: 19
(SJTU: Shanghai Jiao Tong University)
Abstract The corrosion fatigue (CF) and stress corrosion cracking (SCC) crack growth rates (CGRs) of type 316LN SS and its welds that are used for pressurized water reactor primary water components were evaluated. Effects on CGRs of loading condition, water chemistry and metallurgical microstructure were studied. Experimental results indicated that stress intensity factor K , loading ratio, and frequency control the CGRs of materials along with corrosion potential, chloride, and pH also signific...
Published on Jul 1, 2018in Corrosion1.86
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 3 AuthorsPeter L. Andresen19
Estimated H-index: 19
(SJTU: Shanghai Jiao Tong University)
Stress corrosion crack (SCC) behavior of Type 310S stainless steel (SS) in supercritical water was evaluated at 400°C to 550°C. Crack growth rates (CGR) were obtained as a function of temperature a...
Published on Feb 1, 2018in Journal of Nuclear Materials2.55
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 2 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
Abstract The effect of d K /d a on crack growth behavior of nickel base alloys has been studied by conducting stress corrosion cracking tests under positive and negative d K /d a loading conditions on Alloys 690, 600 and X-750 in high temperature water. Results indicate that positive d K /d a accelerates the SCC growth rates, and the accelerating effect increases with d K /d a and the initial CGR. The FRI model was found to underestimate the d K /d a effect by ∼100X, especially for strain harden...
Published on Jan 1, 2018in Corrosion Science6.36
Zhao Shen3
Estimated H-index: 3
(University of Oxford),
Koji Arioka2
Estimated H-index: 2
,
Sergio Lozano-Perez28
Estimated H-index: 28
(University of Oxford)
Abstract High-resolution characterization was used to understand the mechanisms controlling stress corrosion cracking (SCC) in Alloy 600 exposed to simulated PWR primary water conditions. Three potential active crack tips obtained from different types of grain boundaries were studied and compared. The results suggest that the dominant mechanism controlling SCC propagation is intergranular internal oxidation. The applied stress, pre-existent residual strain, the accumulation of defects around the...
Published on Nov 1, 2017in Scripta Materialia4.54
Lefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University),
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University)
+ 3 AuthorsPeter L. Andresen19
Estimated H-index: 19
(SJTU: Shanghai Jiao Tong University)
Abstract In the nuclear power industry, few data exist to demonstrate the effectiveness of Zn injection in reducing the crack growth rate of primary component materials. This work shows that Zn injection reduced the stress corrosion cracks growth rate of cold worked 316L stainless steel (SS) by 3 times. ZnCr 2 O 4 oxide was detected both on the crack walls and at the crack tip, showing that Zn substitution in the spinel-type oxide occurred and mitigated stress corrosion cracking.
Published on Oct 1, 2017in Engineering Failure Analysis2.20
H.M. Shalaby5
Estimated H-index: 5
(Kuwait Institute for Scientific Research)
Abstract Failure investigation was conducted on a refinery pipe-to-flange weld joint that suffered cracking. Both the pipe and flange are made of AISI 321 stainless steel. The flange was circumferentially welded to the pipe which is seam welded. The investigation revealed that both the circumferential and seam welds were in sound conditions, namely no evidences of sensitization, lack of weld penetration, and voids or porosities. Thus, welding practices were not suspected to be the cause of failu...
Published on Mar 1, 2017in Corrosion Science6.36
Lijin Dong4
Estimated H-index: 4
(NU: Northeastern University),
EnhouHAN56
Estimated H-index: 56
(CAS: Chinese Academy of Sciences)
+ 2 AuthorsLei Wang10
Estimated H-index: 10
(NU: Northeastern University)
Abstract Environmentally assisted crack growth behavior of 308L stainless steel weld metal in simulated primary water was investigated. The results showed ultra-low stress corrosion crack growth in the weld metal. However, obvious environmental acceleration of fatigue crack growth was observed, which is increased by more aggressive water chemistry and gentle cyclic loading conditions. Further, the environmental fatigue crack growth rate of 308L weld metal was lower than that of 304 and 316 stain...
Published on Sep 1, 2016in Corrosion Science6.36
Donghai Du4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University)
+ 4 AuthorsPeter L. Andresen19
Estimated H-index: 19
(GE: General Electric)
Abstract Cold work of materials, dissolved oxygen and chloride in water are crucial factors that accelerate the stress corrosion cracking (SCC) crack growth rate of stainless steel in high temperature water. Cold worked austenitic stainless steel type 316 and 316L were studied in order to obtain their effects on SCC crack growth rates in 288 and 325 °C water. Similar SCC behavior were identified for 316 and 316L. Cold working induced comparatively high crack growth rate up to 10 −8 mm/s even in ...
Published on Sep 1, 2016in Journal of Nuclear Science and Technology1.25
Zhengang Duan2
Estimated H-index: 2
(SJTU: Shanghai Jiao Tong University),
Farzin Arjmand3
Estimated H-index: 3
(SJTU: Shanghai Jiao Tong University)
+ 1 AuthorsHiroaki Abe10
Estimated H-index: 10
(Tohoku University)
ABSTRACTThe effects of temperature and dissolved oxygen on the electrochemical behavior and the oxide film formation of grades 304L and 316L stainless steels at high-temperature borated and lithiated water were investigated by means of potentiodynamic polarization, scanning electron microscopy and X-ray photoelectron spectroscopy. The results revealed that increasing the solution temperature degrades the passivity of the oxide films formed on both grades of steel and shifts their corrosion poten...
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