Effect of shot peening on primary water stress corrosion cracking of Alloy 600 steam generator tubes in an operating PWR plant

Hur, Do Haeng; Choi, Myung Sik; Lee, Deok Hyun; Song, Myung Ho; Kim, Seon Jin; Han, Jung Ho

doi:10.1016/j.nucengdes.2003.09.002

Cited by 19 publications

(7 citation statements)

References 6 publications

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“…Que et al (2022) found that SP-treated Alloy 182 showed a higher SCC susceptibility due to the deterioration of the surface state and the following formation of a porous oxide film. Similar results can also be obtained in the investigation of Hur et al (2004). On the contrary, other studies (Lu et al, 2015;Yeh et al, 2013) claimed that SP can both mitigate the SCC initiation and slow the SCC propagation because of the introduction of residual compressive stress.…”

Section: Introductionsupporting

confidence: 82%

“…At present, surface peening such as traditional shot peening (SP), laser shock peening (LSP) and water jet cavitation peening (WJP) are used to relieve the SCC of the alloys due to the improvement of stress state (Que et al , 2022; Hur et al , 2004). Among these, the effect of SP on SCC resistance of the alloy in high temperature water was not consistent and has a huge discrepancy.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the effect of water jet cavitation peening on stress corrosion cracking behavior of nickel-based alloy 600 and alloy 182 in high temperature water

Ming

Peng²,

Han³

et al. 2022

ACMM

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Purpose This paper aims to understand the effect of water jet cavitation peening (WJP) on stress corrosion cracking (SCC) behavior of alloy 600 and alloy 182 in high temperature water. Design/methodology/approach Surface and cross-section morphology, grain boundary microstructure, residual stress and strain distribution, hardness and surface roughness in water jet cavitation peened alloy 600 and alloy 182 were characterized. Findings A superior stress corrosion cracking resistance was obtained in 600MA, which can be attributed to the formation of the ultrafine grain layer and the higher magnitude residual compressive stress. Originality/value Relationship between WJP-induced microstructure and stress state change and SCC susceptibility was conducted. It could provide a theoretical basis for developing application of WJP in nuclear power plants.

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Section: Introductionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Comparison of the effect of water jet cavitation peening on stress corrosion cracking behavior of nickel-based alloy 600 and alloy 182 in high temperature water

Ming

Peng²,

Han³

et al. 2022

ACMM

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“…There were some indications that the EAC cracks observed on the FTT specimens with SP surface can initiate from the pre-existing defects/cracks. Pre-existing peening-induced defects/ cracks, together with the severely deformed near-surface microstructures and the hardened surface layer, promote the EAC initiation and early crack growth, which can lead to the decreased EAC resistance of the shot peened surface treatment in the BWR NWC water in this study.. Peening needs to be performed after the manufacturing and before EAC starts, otherwise it is not very effective in retarding either crack initiation or growth [32]. Furthermore, some work on a Japanese nuclear power plant showed that peening prevented further crack length propagation but did not suppress crack deepening [33].…”

Section: Shot Peened Surfacementioning

confidence: 95%

Investigation of surface treatment effects on the environmentally-assisted cracking behaviour of Alloy 182 in boiling water reactor environment

Que

Zajec

Ritter

et al. 2022

Corrosion Engineering, Science and Technology

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Surface treatments of primary circuit components in light water reactors are regarded as possible ways to mitigate environmentally-assisted cracking (EAC). To date, it is not fully conclusive which surface condition is suitable to reduce the EAC initiation susceptibility. Constant extension rate tensile (CERT) tests were performed by several labs using flat tapered tensile specimens with different surface conditions (ground, industrial face milled, advanced face milled and shot peened), exposed to a boiling water reactor normal water chemistry environment at 288°C. Despite some scatter in the results, the CERT tests revealed that the EAC initiation susceptibility seems lowest for the advanced face milled surface and highest for the shot peened surface. However, it must be emphasised that the differences were moderate and that the surprising behaviour of the shot peened surface can be explained. The mechanical grinding of the surface did not significantly retard EAC initiation compared to industrial face milling.

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“…On the surface, residual compressive stresses and work hardening are able to stop difficult crack propagation, reducing the probability of fatigue damage. Thus, the increase in resistance to fatigue, stress corrosion cracking, fretting, galling, erosion, and closing pores are common benefits that result from the shot peening process [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Microstructure and Shot Peening Treatment on Corrosion Resistance of AISI F55-UNS S32760 Super Duplex Stainless Steel

et al. 2018

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Shot peening is a surface process commonly used in the aeronautic and automotive industries to improve fatigue resistance. Shot peening is proven to be beneficial in the fatigue behavior of components, but rarely has its influence on wear and pitting corrosion resistance been evaluated. In this work, shot peening was performed on AISI F55-UNS S32760 super-duplex stainless steel samples previously submitted to various thermal treatments, to obtain different initial microstructures and properties. Samples have been characterized in terms of microstructure morphology, local chemical composition, microhardness of each constituent phase, and energy dissipation modes. The enhanced properties provided by shot peening has been evaluated through residual stress depth profiles and Full Width at Half Maximum (FWHM) using X-ray diffraction (XRD), surface hardness, surface roughness, and corrosion resistance through salt spray fog tests. The 1400 °C solution thermal treatment was identified as the optimum initial condition, which maximizes the advantages of the shot peening treatment, even pitting corrosion resistance. These results are related to the uniformity of austenite and ferrite in terms of microstructure morphology, micromechanical properties, and alloying elements distribution.

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Effect of shot peening on primary water stress corrosion cracking of Alloy 600 steam generator tubes in an operating PWR plant

Cited by 19 publications

References 6 publications

Comparison of the effect of water jet cavitation peening on stress corrosion cracking behavior of nickel-based alloy 600 and alloy 182 in high temperature water

Comparison of the effect of water jet cavitation peening on stress corrosion cracking behavior of nickel-based alloy 600 and alloy 182 in high temperature water

Investigation of surface treatment effects on the environmentally-assisted cracking behaviour of Alloy 182 in boiling water reactor environment

Influence of Microstructure and Shot Peening Treatment on Corrosion Resistance of AISI F55-UNS S32760 Super Duplex Stainless Steel

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