Microscopic examination of an Alloy 600/182 weld

Lim, Youn-Mook; Kim, Hong Pyo; Cho, Hai Dong; Lee, Han Hee

doi:10.1016/j.matchar.2009.08.005

Cited by 41 publications

(7 citation statements)

References 18 publications

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“…During the solidification phase of the welding, re-distribution of the solutes occurs, as a result, two types of precipitates have distributed on the dendritic grain boundaries during the cooling phase after solidification. One is small round Si carbides and Ti carbides hard particles, and the other is polygonal chromium carbides (Lim et al, 2009). The chromium carbides precipitated around grain boundaries of Inconel 182 will significantly scratch the surface layer of tool inserts and induce tool severe chipping, which is detrimental for tool life.…”

Section: Results and Discussion 31 Microstructure Of Inconel 182 Overmentioning

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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Section: Results and Discussion 31 Microstructure Of Inconel 182 Overmentioning

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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“…As the substrate and weld metal are both Inconel 182 during this secondary welding process, the chromium depletion due to difference in melting temperature between base metal and weld metal will no longer happen. In addition, as the dissolution temperature of chromium carbide is far lower than the melting temperature of the matrix, 19 the chromium carbide precipitates during the cooling phase after solidification of the matrix will significantly increase the micro-hardness. Therefore, the micro-hardness in this region reaches the maximum value.…”

Section: Resultsmentioning

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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“…Here, kernel average misorientation (KAM) is used to estimate the residual strain following a rainbow color code, with colors from blue to red denoting minimal to maximal residual strain. The observed boundaries were classified into three groups according to the coincidence site lattice (CSL) model: low-angle boundaries (LAB, 5°\ h\15°), CSL boundaries (3 B R B 29) and random high-angle grain boundaries (RGB, 15°\ h\180°) [16]. The CSL designation was defined based on Palumbo-Aust's criterion [17], with the maximum allowable deviation angle obtained from the exact coincidence relationship, h = 15°R -5/6 .…”

Section: Ebsd Scanning Of 316l Base Metal and Hazmentioning

confidence: 99%

Microstructure, Residual Strain and Stress Corrosion Cracking Behavior in 316L Heat-Affected Zone

Ming

Zhang

Xiu

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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Austenitic stainless steels are usually chosen to make many components of nuclear power plants (NPPs). However, their microstructure in the heat-affected zone (HAZ) will change during the welding process. Some failures of the weld joints, mainly stress corrosion cracking (SCC), have been found to be located in the HAZ. In this research, the microstructure, micro-hardness, residual strain and SCC behavior at different locations of the 316L HAZ cut from a safeend dissimilar metal weld joint were studied. However, traditional optical microscope observation could not find any microstructural difference between the HAZ and the base metal, higher residual strain and micro-hardness, and higher fraction of random high-angle grain boundaries were found in the HAZ than in the base metal when studied by using electron back-scattering diffraction scanning and micro-hardness test. What's more, the residual strain, the microhardness and the fraction of random grain boundaries decreased, while the fraction of coincidence site lattice grain boundaries increased with increasing the distance from the fusion boundary in 316L HAZ. Creviced bent beam test was applied to evaluate the SCC susceptibility at different locations of 316L HAZ and base metal. It was found that the HAZ had higher SCC susceptibility than the base metal and SCC resistance increased when increasing the distance from the fusion boundary in 316L HAZ.

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Microscopic examination of an Alloy 600/182 weld

Cited by 41 publications

References 18 publications

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

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

Microstructure, Residual Strain and Stress Corrosion Cracking Behavior in 316L Heat-Affected Zone

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