Stress corrosion cracking sealing in overlaying of Inconel 182 by laser surface melting

Bao, Gang; Shinozaki, Kenji; Iguro, Syuntaro; Inkyo, Mitsugi; Yamamoto, Mikio; Mahara, Yoichi; Watanabe, Hiroshi

doi:10.1016/j.jmatprotec.2005.11.037

Cited by 21 publications

(4 citation statements)

References 10 publications

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“…To prevent oxidization, the LSM process was performed in He shielding gas with a ow rate of 20 l/min. Moreover, the weld beads produced in each pass were offset by a distance of 5 mm from one another in order to increase the size of the treatment area 8,11) . Figure 1 presents schematic illustrations of the GTAW and LSM processes.…”

Section: Methodsmentioning

confidence: 99%

“…Several studies have shown that LSM also has the ability to improve the stress corrosion cracking (SCC) resistance of Alloy 182 11,12) . While several new weld metals, e.g., Alloy 52/52M, with a higher corrosion resistance than Alloy 182/82 have been introduced in recent years, the corrosion resistance of Alloy 182/82 welds continues to be a major concern since many old nuclear power plants are expected to remain in operation for sixty years or more.…”

Section: Introductionmentioning

confidence: 99%

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The Improvement of Corrosion Resistance of Sensitized Alloy 82 Welds Using Laser Surface Melting

Lee

Liu

2017

Mater. Trans.

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The corrosion resistance of sensitized Alloy 82 welds is improved by laser surface melting (LSM) with a continuous CO 2 laser beam. The effects of the LSM treatment on the segregation of impurities in the matrix and the precipitation of carbides at the grain boundaries are systematically explored. The observation results show that the LSM process results in the formation of a rapidly solidi ed surface layer with a thickness of approximately 160 180 μm. In addition, the corrosion test results show that the LSM treatment improves the resistance of the weld to both intergranular corrosion (IGC) and pitting corrosion. The improved corrosion resistance can be attributed to a higher proportion of low-angle boundaries (2 15) in the solidi ed microstructure, the elimination of Cr-carbide precipitates in the matrix, and the suppression of Cr-depletion zones at the grain boundaries. Overall, the results con rm the effectiveness of LSM treatment for the in-situ repair and corrosion resistance restoration of Alloy 82 welds.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Improvement of Corrosion Resistance of Sensitized Alloy 82 Welds Using Laser Surface Melting

Lee

Liu

2017

Mater. Trans.

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“…Inconel 182 is a kind of typical welding material, the microstructural and compositional features of Inconel 182 as well as its corresponding intergranular cracking or intergranular stress corrosion cracking properties are studied by many scientific researchers (Bao et al, 2006) (Jang et al, 2008). However, few literature has reported it machinability.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of minimum quantity lubrication effects by cutting force signals in face milling of Inconel 182 overlays

Wang

Chen

et al. 2015

Journal of Cleaner Production

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“…7–9 As Inconel 182 is a kind of typical welding material, 10 many scientific researchers focused on the microstructural and compositional features of Inconel 182 as well as its corresponding intergranular cracking or intergranular stress corrosion cracking properties. Bao et al 11 studied the stress corrosion cracking sealing in Inconel 182 overlays by laser surface melting. They found that the Inconel 182 intergranular cracking or intergranular stress corrosion cracking damage could easily occur in nuclear power plants.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and machinability of the Inconel 182 overlays at different overlay thickness deposited by shield metal arc welding

Wang

Chen

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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Nuclear steam turbines are well-known working in saturated wet-steam environment. The use of anti-corrosion material depositing or coating on the critical components and then machining to the required thickness with specific surface quality can be an effective and economical way to prevent critical components of steam turbines from corrosion and erosion. Inconel 182 can be this anti-corrosion material; however, a few literature has reported its machinability, not to mention its machinability at different overlay thickness. The objective of this study is to investigate the influence of the coated overlay thickness on microstructures and machinability of Inconel 182 overlays. First, the micro-hardness and microstructures of Inconel 182 overlays at different overlay thickness are studied. Afterwards, cutting forces, cutting temperature, surface roughness and the machined surface morphology at different overlay thickness are discussed. Finally, the prediction model for machining Inconel 182 overlays at different overlay thickness is established. The results indicate that the microstructures of Inconel 182 overlays strongly rely on overlays thickness and Inconel 182 electrode diameter (3.2 mm). The prediction model illustrates that the machinability of Inconel 182 overlays is acceptable at overlay thickness from about 0 to 2.1 mm; it is poor at overlay thickness from about 2.1 to 6.4 mm, and it is stable at overlay thickness from about 6.4 to 10 mm.

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Stress corrosion cracking sealing in overlaying of Inconel 182 by laser surface melting

Cited by 21 publications

References 10 publications

The Improvement of Corrosion Resistance of Sensitized Alloy 82 Welds Using Laser Surface Melting

The Improvement of Corrosion Resistance of Sensitized Alloy 82 Welds Using Laser Surface Melting

Evaluation of minimum quantity lubrication effects by cutting force signals in face milling of Inconel 182 overlays

Microstructures and machinability of the Inconel 182 overlays at different overlay thickness deposited by shield metal arc welding

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