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Kai Chen
Shanghai Jiao Tong University
23Publications
4H-index
87Citations
Publications 23
Newest
Published on Jul 1, 2019in Corrosion Science 6.36
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)
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 b...
Published on Aug 1, 2019in Journal of Nuclear Materials 2.55
Donghai Du4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 1 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
Abstract Stress corrosion cracking (SCC) behavior of ∼20% warm forged 316L stainless steel (SS) round bar was evaluated for different cracking orientations relative to the applied deformation in hydrogenated and oxygenated high purity water at 325 °C. Different SCC crack growth rates (CGRs) obtained at three orientations demonstrates that the L-R orientation where cracking occurred in the plane of deformation has the highest SCC susceptibility, while the C-L orientation where cracking was orient...
Published on Apr 10, 2019in Corrosion 1.86
Miss Jiamei Wang (SJTU: Shanghai Jiao Tong University), Lefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University),
Kai Chen
Abstract: The effects of applied potential, dissolved oxygen and chloride ion (Cl-) on the stress corrosion cracking (SCC) susceptibility of a 316NG weld joint and sensitized 316NG stainless steel ...
Published on Jul 1, 2019in Journal of Nuclear Materials 2.55
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 5 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
Abstract The stress corrosion cracking growth behavior of cold worked Alloy 690 has been studied in high temperature pressurized water at temperatures between 360 °C and 550 °C. Creep induced cracking was measured at each testing temperature in inert argon environment. Experimental results showed that creep contributed to more than 80% of the overall crack growth rate at temperatures above 450 °C, while only 8% at 360 °C. Sensitization of the post-tested specimens was quantitatively identified, ...
Published on May 1, 2019in Corrosion Science 6.36
Zhao Shen3
Estimated H-index: 3
(University of Oxford),
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University)
+ 3 AuthorsSergio Lozano-Perez28
Estimated H-index: 28
(University of Oxford)
Abstract The crack initiation on a cold-worked surface of Alloy 600, exposed to simulated pressurized water reactor primary water, was mechanistically studied through high-resolution characterization. Mechanical polishing introduced a thin recrystallization layer on the specimen surface, which lead to the crack initiation along highly-deformed recrystallization grain boundaries after preferential oxidation. Intergranular crack propagation occurred once the initiation cracks met the matrix grain ...
Published on May 1, 2019in Annals of Nuclear Energy 1.38
Xianglong Guo9
Estimated H-index: 9
(SJTU: Shanghai Jiao Tong University),
Yi Fan (SJTU: Shanghai Jiao Tong University)+ 4 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
Abstract Due to increasing attentions to supercritical water reactor (SCWR), the corrosion response of materials in supercritical water (SCW) has attracted lots of research interests. This paper summarizes the current corrosion test results conducted in Shanghai Jiao Tong University (SJTU) and compares the data with literature data. The corrosion resistances of candidate materials (including ferritic/martensitic (F/M) steel, austenitic stainless steel, alumina-forming austenitic (AFA) stainless ...
Published on Feb 1, 2019in Corrosion Science 6.36
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 Feb 1, 2019in Journal of Nuclear Materials 2.55
Zhao Shen3
Estimated H-index: 3
(University of Oxford),
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University)
+ 1 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
Abstract General corrosion and stress corrosion cracking (SCC) susceptibility of an oxide dispersion strengthened (ODS) austenitic 310 (310-ODS) steel in supercritical water (SCW) are studied by weight gain and slow strain rate tensile (SSRT) testing, respectively. 310-ODS steel shows an excellent general corrosion resistance in SCW at 600 °C. Energy dispersive X-ray (EDX) and electron backscattered diffraction (EBSD) are conducted on the cross-section of the surface oxide film, revealing a doub...
Published on Jan 1, 2019in Scripta Materialia 4.54
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 This work compared the stress corrosion cracking (SCC) susceptibility of two austenitic alloys in supercritical water (SCW), and revealed the quantitative difference of SCC growth rates through scanning transmission electron microscopy (STEM). Results showed that in-situ sensitization and creep occurred on the specimens during the SCC tests in SCW environment. Higher degree of Cr-depletion at the grain boundary ahead of the SCC crack tip was identified in the Fe- 25 Cr steel specimen, w...
Published on Dec 1, 2018in Corrosion 1.86
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 1 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
The stress corrosion crack (SCC) initiation and propagation behavior of three heats of Alloy 600 in simulated pressurized water reactor (PWR) primary water have been studied. The SCC initiation time could be effectively detected using constant load tests with in situ direct current potential drop (DCPD) method. Materials with lower SCC initiation time also showed higher SCC crack growth rate (CGR) under constant K condition. The relationship between SCC initiation time and CGR of Alloy 600 was q...
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