Initiation of Environmentally Assisted Cracking in High-Temperature Water

Wang, S.; Shoji, Tetsuo; Kawaguchi, Nobuaki

doi:10.5006/1.3278168

Cited by 25 publications

(7 citation statements)

References 1 publication

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“…The surface work hardening layer, which corresponds to the thick oxide film on the crack wall, has been confirmed by micro-hardness testing. 4) With time, the crack would reach a grain boundary and grow intergaranularlly. In Fig.…”

Section: Resultsmentioning

confidence: 99%

Cracking Paths During Initiation of Environmentally Assisted Cracking in High Temperature Water

Wang

Takeda

Sakaguchi

et al. 2005

Journal of Nuclear Science and Technology

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Section: Resultsmentioning

confidence: 99%

Cracking Paths During Initiation of Environmentally Assisted Cracking in High Temperature Water

Wang

Takeda

Sakaguchi

et al. 2005

Journal of Nuclear Science and Technology

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“…On a basis of the results in this work and other investigations [11], electropolishing should be devised to increase the corrosion resistance of metals applied in NPPs. Abnormal scratches must also be avoided during manufacture, which have been investigated to act as SCC raisers [6,8].…”

Section: Effect Of Surface Condition On Oxidation Behaviormentioning

confidence: 99%

“…SCC susceptibility has been investigated to largely depend on the nature of the oxide film grown on metals applied in high temperature pressurized (HTP) water [3,[6][7][8]. Therefore, the effect of surface condition on oxidation behavior of metals in HTP water has also been analyzed.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, Ziemniak et al [11] stated that electropolishing contributed to the formation of a more protective oxide film on 304 stainless steel by removing the cold-worked layer. Wang et al [6] found that cracks usually initiated from surface scratches introduced by machining, where the oxidation rate was higher, i.e., the oxide film was thicker.…”

Section: Introductionmentioning

confidence: 99%

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Effects of surface states on the oxidation behavior of 316LN stainless steel in high temperature pressurized water

Guo

Han

Wang

2014

Materials & Corrosion

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Nuclear grade 316LN stainless steel with different surface states are prepared: electropolished and ground to 240 grit. Surface topography, surface Volta potential distribution, and nanohardness distribution on cross‐sectional surface are investigated, respectively. Oxide films on the ground and electropolished samples after immersion in high temperature pressurized (HTP) water for 0.1, 168, and 366 h were studied using various methods. Distinct from electropolished surface, the ground surface is featured by a rugged surface and a heterogeneous distribution of surface Volta potential. A thicker (∼28 µm) cold‐worked layer was introduced by grinding. More crystallites were precipitated on the ground surface, resulting from the existence of high‐energy sites with higher residual strain and higher electrochemical activity and a less protective inner layer. The oxidation rate was reduced by electropolishing and a thinner oxide film was formed, due to the formation of a more protective oxide film with higher content of chromium (Cr). The mechanism of oxide film formation was further discussed.

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“…The SCC of low-carbon austenitic stainless steels has been reported since 1990s (1) . Detailed investigation of such a process revealed that a work-hardened surface layer, which is often introduced during manufacturing processes, increases susceptibility to SCC (2)(3)(4) .…”

Section: Introductionmentioning

confidence: 99%

Growth Process of Oxide Films Formed on Type 316L Stainless Steel with Work-Hardened Surface Layers under Creviced Bent Beam Test Conditions in High-Temperature Water

Tomozawa

Miura

Kako

2013

JMMP

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A creviced bent beam (CBB) test was performed on Type 316L stainless steels with work-hardened surface layers in high-temperature water at 561 K. Growth process of the oxide films on the surface was investigated by cross-sectional transmission electron microscope observation. The oxide films were found to consist of an inner Cr-rich layer and an outer layer of Fe 3 O 4 particles. The crystal structure of the inner layer changed from a face center cubic to a spinel-type with an increase in CBB test duration. The inner layers showed a cube-on-cube orientation relationship with adjacent austenite grains of the substrates.

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Initiation of Environmentally Assisted Cracking in High-Temperature Water

Cited by 25 publications

References 1 publication

Cracking Paths During Initiation of Environmentally Assisted Cracking in High Temperature Water

Cracking Paths During Initiation of Environmentally Assisted Cracking in High Temperature Water

Effects of surface states on the oxidation behavior of 316LN stainless steel in high temperature pressurized water

Growth Process of Oxide Films Formed on Type 316L Stainless Steel with Work-Hardened Surface Layers under Creviced Bent Beam Test Conditions in High-Temperature Water

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