Effect of Corrosion Potential and Microstructure on the Stress Corrosion Cracking Susceptibility of Nickel-Base Alloys in High-Temperature Water

Saito, Nobuyoshi; Tanaka, S.; Sakamoto, Hiroshi

doi:10.5006/1.3277526

Cited by 16 publications

(15 citation statements)

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“…And then the matrix compositions vary and the diffusion equations are solved according to the new matrix compositions. Saito et al (2003) 1.94 0.24 0.12…”

Section: Setting Up the Problemmentioning

confidence: 97%

“…The phases of Inconel 182 identified under the different heat treatment conditions also agreed with other researchers' experimental obser- vations. The precipitates of M 23 C 6 were also identified (Briant and Hall, 1987b;Saito et al, 2003;Sireesha et al, 2005).…”

Section: Identification Of Intergranular Microconstituents By Temmentioning

confidence: 98%

“…Briant and Hall (1987a,b) Page (1988) studied the SCC susceptibility of Inconel 182 weld metals in the pure water environment containing sulfuric acid additions. Saito et al (2003) investigated the SCC failure of Inconel 182 with nitric acid test and reported the effect of hydrogen water chemistry condition on SCC initial lifetime. Tsai et al (2005) studied the IGC occurrence of Inconel 182 by employing chemical and electrochemical evaluation techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Briant and Hall (1987b) argued the microstructural causes of IGC in Inconel 182 weld metals. Saito et al (2003) studied the effect of microstructure on the SCC susceptibility of Inconel 182 in high-temperature water based on the microstructural analysis on grain boundaries. Sireesha et al (2005) studied the microstructure of Inconel 182 and identified the precipitates by X-ray diffraction.…”

Section: Introductionmentioning

confidence: 99%

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Precipitation and Cr depletion profiles of Inconel 182 during heat treatments and laser surface melting

Bao

Yamamoto

Shinozaki

2009

Journal of Materials Processing Technology

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a b s t r a c tThermodynamic and kinetic modeling were conducted to simulate Cr depletion profiles near grain boundaries in Inconel 182 during heat treatments and laser surface melting (LSM) using Thermo-Calc and DICTRA code. The effect of Nb addition was also considered in the modeling. Based on the good agreement with Cr concentration distributions during the heat treatments measured experimentally, Cr depletion profiles adjacent to grain boundaries during the heat treatments and the LSM process were modeled. The Cr depletion profiles were evaluated using the Cr depletion area below the critical Cr concentration for intergranular cracking/intergranular stress corrosion cracking (IGC/IGSCC) susceptibility (12 mass%).Compared with the result of the Streicher test, the calculated Cr depletion areas showed good agreement with IGC/IGSCC susceptibilities. The sample after stress relief (SR) treatment had the largest Cr depletion area and showed the poorest IGC/IGSCC resistance. Cr depletion showed some recovery during subsequent low temperature sensitization (LTS).The sample after the LSM process had the smallest Cr depletion area and showed the best IGC/IGSCC resistance.

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“…And then the matrix compositions vary and the diffusion equations are solved according to the new matrix compositions. Saito et al (2003) 1.94 0.24 0.12…”

Section: Setting Up the Problemmentioning

confidence: 97%

Section: Identification Of Intergranular Microconstituents By Temmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Precipitation and Cr depletion profiles of Inconel 182 during heat treatments and laser surface melting

Bao

Yamamoto

Shinozaki

2009

Journal of Materials Processing Technology

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“…The calculated ECPs of 316L SS and Alloy 182 were compared with directly measured ECPs [20][21][22][23] ( Figures 12 and 13). The calculated ECPs of 316L SS had the S-shaped curve which was the same as seen for 304 SS and the directly measured ECPs.…”

Section: L Ss and Alloy 182mentioning

confidence: 99%

Cathodic polarization curves of the oxygen reduction reaction on various structural materials of boiling water reactors in high temperature–high purity water

Tachibana

Ishida

Wada

et al. 2012

Journal of Nuclear Science and Technology

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Cathodic polarization curves of the O 2 reduction reaction were measured by using electrodes made from typical structural materials of boiling water reactors (BWRs) to evaluate the effects of kind of material on the electrochemical corrosion potential (ECP) calculation. To estimate ECPs at any region in the BWRs on the basis of the BWR environmental conditions, anodic and cathodic polarization curves should be obtained in advance under relevant conditions. The concentration of oxidants such as O 2 and H 2 O 2 in coolant changes depending on the region in which they exist. As well, reduction reaction rates might differ depending on the kind of materials. In this work, the cathodic polarization curves of type 316L stainless steel (316L SS) and Alloy 182 were measured in high purity water at 553 K with different O 2 concentrations and compared with those of type 304 SS (304 SS). The results showed that the cathodic polarization curves differed depending on the kind of materials at the activation-controlled region. But, the difference in the ECP vs. O 2 concentration relationship was small when the ECPs were calculated by using both anodic and cathodic polarization curves measured on the objective material.

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Microstructure and stress corrosion cracking of the fusion boundary region in an alloy 182-A533B low alloy steel dissimilar weld joint

et al. 2010

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Effect of Corrosion Potential and Microstructure on the Stress Corrosion Cracking Susceptibility of Nickel-Base Alloys in High-Temperature Water

Cited by 16 publications

References 0 publications

Precipitation and Cr depletion profiles of Inconel 182 during heat treatments and laser surface melting

Precipitation and Cr depletion profiles of Inconel 182 during heat treatments and laser surface melting

Cathodic polarization curves of the oxygen reduction reaction on various structural materials of boiling water reactors in high temperature–high purity water

Microstructure and stress corrosion cracking of the fusion boundary region in an alloy 182-A533B low alloy steel dissimilar weld joint

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