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stress corrosion cracking damage

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Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1397-1406, October 22–25, 2013,
... Abstract Current nondestructive examination (NDE) technology detection capabilities limit our ability to detect stress corrosion cracking (SCC) damage until it has progressed significantly. This work describes the continued development of an in-situ monitoring technique to detect...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1388-1396, October 22–25, 2013,
... Abstract Recently, boiler waterwall tube damage such as fireside corrosion and circumferential cracking in low NOx environments has become a serious issue in Japan, despite the typical use of relatively lower sulfur content coal is typically being used than in US. Thermal spray coating has been...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 747-758, October 11–14, 2016,
... are available to promote the crack growth rate: - Level of stress - Corrosion in the steady state phase - Reduction of material ductility (minimum between 240-280°C) [2] Regarding this complex question map, it was clear, that the investigation program was not sufficient to solve this problem. Room temperature...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 1075-1085, October 11–14, 2016,
... Abstract In Europe between 2006 and 2012 several ultra-super-critical (USC) coal-fired power plants were built employing T24 (7CrMoVTiB10-10 / DIN EN 10216-2:2014-03 / VdTÜV sheet 533/2) in membrane walls. During commissioning stress corrosion cracking (SCC) on the tube-to-tube butt welds...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 528-539, October 15–18, 2024,
... components of the Rankine cycle. Many damage mechanisms have been identified, which include corrosion, thermal fatigue, creep, and stress corrosion cracking, among others. Much of the damage can be attributed to poor water/steam chemistry and inadequate temperature control. While damage in the Rankine cycle...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 1098-1112, October 11–14, 2016,
... to water. All of these cracks were located in the area of welds. This severe damage resulted in an intensive root cause analysis. Different institutes were involved all coming to the same finding that the boiler was affected by stress corrosion cracking (SCC) as the primary cause of damage. Three different...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1206-1219, October 22–25, 2013,
... extension is remaining life assessment technology. This paper will outline remaining life procedures which will incorporate the defect tolerant design concepts applied to the various damage mechanisms such as creep, fatigue, creep-fatigue and stress corrosion cracking. Also other embrittlement mechanisms...
Proceedings Papers

AM-EPRI2004, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Fourth International Conference, 1313-1325, October 25–28, 2004,
... initiation and for assessing the significance of existing cracks discovered during service. Thermal shock crack growth is influenced by factors like shock severity, applied mechanical stress, and the corrosive environment. In service, cracks often arrest and pose minimal risk. This work explores a broader...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 450-469, August 31–September 3, 2010,
... and Life Sciences (BOKU), Vienna, Austria. Overall technical integration is being provided by STI Technologies, SimuTech Group, of Rochester, NY. Previous Work A comprehensive survey of corrosion-fatigue (CF) and of stress-corrosion cracking (SCC) problems in steam turbines was given by Holdsworth [1...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 712-722, October 15–18, 2024,
..., chemical analysis, stereomicroscopy, metallography, and scanning electron microscopy showed that extensive cracking of the conduit and seal table material occurred due to stress corrosion cracking (SCC). Assessment showed that chlorine-containing deposits were present on the exterior of the conduit...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1090-1097, October 21–24, 2019,
... of the leakages revealed common features of stress relief cracking (SRC) such as highly localized intergranular cracking in the heat affected zone (HAZ) near the fusion line, creep void formation at the crack tip and around the crack. At that time no other SRC damages were known for the employed 25% Chromium...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 750-761, October 21–24, 2019,
..., C. Esnouf, L. Fournier and D. Delafosse, "Influence of ageing heat treatment on alloy A-286 microstructure and stress corrosion cracking behavior in PWR primary water," Journal of Nuclear Materials, vol. 360, pp. 222-230, 2007. 760 [12] B. S. Rho and S. W. Nam, "Fatigue-induced precipitates at grain...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 603-613, October 21–24, 2019,
... but does not penetrate in the thickness direction. This may result from increase in the local stress in weld metal due to stress redistribution during creep reported in previous study [9]. Creep Damage Detection Figure 6 shows the surface cracks observed at different creep time at 750°C and 100MPa...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 23-38, October 15–18, 2024,
... (WLAM) specimens showed oxidation behavior similar to wrought 316L SS in PWR PW, though stress corrosion cracking (SCC) susceptibility varied with heat treatment. In nitric acid testing, laser powder bed fusion (L-PBF) specimens demonstrated superior corrosion resistance compared to conventional SS...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 65-71, August 31–September 3, 2010,
... for alloy and pressure vessel steels, mitigation of intergranular stress corrosion cracking (IGSCC) in austenitic stainless steel piping, etc., just to name a few. Research continues throughout the three aforementioned sector areas and will inevitably generate new understanding of damage mechanisms...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 1114-1125, October 15–18, 2024,
... behavior and to understand the involved damage mechanisms. Thermostatic and cyclic exposure tests have shown that cracking is favored by the formation of brittle phases due to iron dilution from the substrate material during the manufacturing process. Recommendations for the welding process of hardfaced...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 356-364, October 11–14, 2016,
... Abstract A longitudinal crack and window opening type failure occurred in neutral zone that is applied to least plastic deformation in the bent TP347H tube during operation. From the analysis of residual stress and plastic deformation during the tube bending, there is low creep strength...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 715-725, October 21–24, 2019,
..., indicating that this failure is not associated with stress corrosion damage. (a)Image (b)Composition of site1 (c) Composition of site2 Figure: 9 EDS Analysis of Precipitates and matrix of elbow N25W6-6B4 (a)Image (b)Composition Figure: 10 Broken surface of N25W6-6B6 Figure 11 shows the metallographic...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 897-908, October 15–18, 2024,
... concluded that selective diffusion of Cr at the grain boundaries (GBs) of the Ni-base alloy Hastelloy N made these sites susceptible to further corrosion crack. Stress further promoted Cr diffusion and accelerated GB carbide precipitation, thereby forming a corrosion couple between the carbide and matrix...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 271-282, October 11–14, 2016,
.... Creep void nucleated on the grain boundaries at the interface of precipitates (such as Laves phase, M23C6 carbides et al.) and triple junctions, grew and integrate into micro/macro cracks intergranularlly in the vertical direction of applied stress, finally led to the failure. Based on the damage...