Effect of Heat Treatment Conditions on Stress Corrosion Cracking Resistance of Alloy X-750 in High Temperature Water

Yonezawa, Takeshi; Onimura, Kichiro; Sakamoto, Naruo; Sasaguri, Nobuya; Nakata, Hidenori; Susukida, Hiroshi

doi:10.2320/jinstmet1952.48.3_238

Cited by 9 publications

(3 citation statements)

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“…These results are the same as the previously published behavior produced by CERT testing. [2][3] Regarding the effect of carbides on IGSCC, similar behavior was reported for Alloy 600, [10][11][12][13] where increasing the carbides at the GB increases the resistance to low-potential SCC. This behavior in hydrogenated water differs significantly from that in oxygenated high-temperature water, [4][5][6][7][8][14][15] where the crack growth rate depends more strongly on the depletion of chromium from the grain boundary.…”

Section: Effect Of the Degree Of Sensitization On Intergranular Stresmentioning

confidence: 58%

Influence of Carbide Precipitation and Rolling Direction on Intergranular Stress Corrosion Cracking of Austenitic Stainless Steels in Hydrogenated High-Temperature Water

Arioka¹,

Yamada²,

Terachi³

et al. 2006

CORROSION

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The intergranular stress corrosion cracking (IGSCC) growth behavior of austenitic stainless steels (SS) in hydrogenated high-temperature water were studied using compact tension specimens (0.5T for cold-worked materials). The effects of carbide precipitation, alloy composition, and the cold rolling direction on crack growth behavior were studied. Then, to examine these infl uences on IGSCC, grain boundary sliding was studied in high-temperature air. The similar dependences of carbide precipitation, cold work, and rolling direction on IGSCC and creep behaviors suggest that grain boundary sliding plays an important role by itself or in conjunction with other reactions such as crack tip dissolution.

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Section: Effect Of the Degree Of Sensitization On Intergranular Stresmentioning

confidence: 58%

Influence of Carbide Precipitation and Rolling Direction on Intergranular Stress Corrosion Cracking of Austenitic Stainless Steels in Hydrogenated High-Temperature Water

Arioka¹,

Yamada²,

Terachi³

et al. 2006

CORROSION

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“…This equation can be easily implemented in simulations other than the original SRDM because of its simplified variables. This model has been used to accurately estimate the crack initiation time, as verified by previous experimental works carried out by Tsuruta and Yonezawa . Best‐fit parameters from the preceding studies by Lee et al were used in the newly proposed PWSCC parametric study.…”

Section: Methodsmentioning

confidence: 78%

An extended finite element method‐based representative model for primary water stress corrosion cracking of a control rod driving mechanism penetration nozzle

Lee

Kang

Choi

et al. 2017

Fatigue Fract Eng Mat Struct

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Primary water stress corrosion cracking incidents have been reported in nuclear reactors over the past several decades. Garud et al developed an empirical equation to express primary water stress corrosion cracking (PWSCC) initiation time by using experimental data. This strain rate damage model has been used in multiple simulation studies. Some of these studies used the extended finite element method (XFEM) to simulate the PWSCC propagation in Alloy 600. However, several studies showed that the accuracy of XFEM depends on the mesh quality. Different mesh qualities can change the heat flux of a welding procedure, leading to different weld residual stresses. We performed a parametric study on PWSCC initiation and propagation of a control rod driving mechanism by using different mesh qualities.The major variables explored here are number of elements per bead, number of circumferential elements, and number of weld beads. Finally, an XFEM-based representative model was suggested for PWSCC initiation and propagation simulation.

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“…Intergranular brittle fracture suggested that hydrogen preferentially diffused/segregated along grain boundaries, partly due to the hydrogen-trapping mechanism on carbides that reduced the cohesive strength of the grain boundaries structure. But, the low density of intergranular carbides sug gested rather that the grain boundaries chemistry and crys tallographic relations could have a strong effect on intergranular rupture too as well as the possibility of inter granular element segregations such as Nb or P [19][20][21].…”

Section: Effect Of Hydrogen On Rupture Modesmentioning

confidence: 99%

Influence of hydrogen on electrochemical behavior of Ni-based superalloy 718

Odemer

Andrieu

Blanc

2018

International Journal of Hydrogen Energy

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Numerous studies have shown that Ni-based superalloy 718 may be sensitive to hydrogen embrittlement and have highlighted the dominant roles played by the hydrogen solubility and the hydrogen trapping. Samples were hydrogenated by cathodic polarization in molten salts under different conditions ta vary the diffusible hydrogen content and ta saturate the different hydrogen traps present in the microstructure strengthened by precipitation. Open circuit potential and galvanic coupling measurements were conducted in order to char acterize the effect of diffusible and trapped hydrogen on electrochemical behavior and to discuss the possibility of galvanic coupling between zones with different hydrogen contents. Hydrogen embrittlement Electrochemistry Galvanic coupling

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Effect of Heat Treatment Conditions on Stress Corrosion Cracking Resistance of Alloy X-750 in High Temperature Water

Cited by 9 publications

References 0 publications

Influence of Carbide Precipitation and Rolling Direction on Intergranular Stress Corrosion Cracking of Austenitic Stainless Steels in Hydrogenated High-Temperature Water

Influence of Carbide Precipitation and Rolling Direction on Intergranular Stress Corrosion Cracking of Austenitic Stainless Steels in Hydrogenated High-Temperature Water

An extended finite element method‐based representative model for primary water stress corrosion cracking of a control rod driving mechanism penetration nozzle

Influence of hydrogen on electrochemical behavior of Ni-based superalloy 718

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