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Kai Chen
Shanghai Jiao Tong University
26Publications
6H-index
125Citations
Publications 27
Newest
#1Jiamei Wang (SJTU: Shanghai Jiao Tong University)H-Index: 7
#2Haozhan Su (SJTU: Shanghai Jiao Tong University)
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Abstract The corrosion fatigue (CF) crack growth behavior of Alloy 52 M in high temperature water was investigated in various water chemistries with dissolved oxygen (DO), dissolved hydrogen (DH) or Ar. The experimental results indicated that at higher load ratio (R), the CF crack growth rates (CGRs) in oxygenated water was slightly higher than Ar deaerated water, while under lower R, the relationship was reversed. Micro-characterization of the crack paths and fracture surfaces revealed that sev...
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Abstract The effect of intergranular (IG) carbides on the cracking behavior of cold worked Alloy 690 was studied in both subcritical and supercritical water (SCW) environments. The crack growth rate (CGR) was lower when IG carbides were removed by prior solution annealed (SA) treatment, indicating a detrimental effect of IG carbides. The presence of IG carbides enhances the local strain accumulation at the grain boundary due to the lattice mismatch, thus promotes the crack tip strain rate and in...
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#1Jiamei Wang (SJTU: Shanghai Jiao Tong University)H-Index: 7
#2Haozhan Su (SJTU: Shanghai Jiao Tong University)
Last.Zhao Shen (SJTU: Shanghai Jiao Tong University)H-Index: 1
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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...
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#1Donghai Du (SJTU: Shanghai Jiao Tong University)H-Index: 5
#2Jiamei Wang (SJTU: Shanghai Jiao Tong University)H-Index: 7
Last.Lefu Zhang (SJTU: Shanghai Jiao Tong University)H-Index: 13
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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...
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#1Jiamei Wang (SJTU: Shanghai Jiao Tong University)H-Index: 7
#2Haozhan Su (SJTU: Shanghai Jiao Tong University)
Last.Kai Chen (SJTU: Shanghai Jiao Tong University)H-Index: 6
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The effects of applied potential, dissolved oxygen (DO), and chloride ion (Cl−) on the stress corrosion cracking (SCC) susceptibility of a 316NG weld joint and sensitized 316NG stainless steel (SS)...
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#1Kai Chen (SJTU: Shanghai Jiao Tong University)H-Index: 6
#2Jiamei Wang (SJTU: Shanghai Jiao Tong University)H-Index: 7
Last.Lefu Zhang (SJTU: Shanghai Jiao Tong University)H-Index: 13
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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, ...
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#1Zhao Shen (University of Oxford)H-Index: 4
#2Kai Chen (SJTU: Shanghai Jiao Tong University)H-Index: 6
Last.Sergio Lozano-Perez (University of Oxford)H-Index: 3
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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 ...
3 CitationsSource
#1Xianglong Guo (SJTU: Shanghai Jiao Tong University)H-Index: 9
#2Yi Fan (SJTU: Shanghai Jiao Tong University)
Last.Lefu Zhang (SJTU: Shanghai Jiao Tong University)H-Index: 13
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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 ...
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#1Donghai Du (SJTU: Shanghai Jiao Tong University)H-Index: 5
#2Jiamei Wang (SJTU: Shanghai Jiao Tong University)H-Index: 7
Last.Peter L. Andresen (SJTU: Shanghai Jiao Tong University)H-Index: 3
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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 significa...
3 CitationsSource
#1Zhao Shen (University of Oxford)H-Index: 4
#2Kai Chen (SJTU: Shanghai Jiao Tong University)H-Index: 6
Last.Lefu Zhang (SJTU: Shanghai Jiao Tong University)H-Index: 13
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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...
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