Phase Identification and Internal Stress Analysis of Steamside Oxides on Plant Exposed Superheater Tubes
Publication: Research - peer-review › Conference article – Annual report year: 2012
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Phase Identification and Internal Stress Analysis of Steamside Oxides on Plant Exposed Superheater Tubes. / Pantleon, Karen; Montgomery, Melanie.
In: Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, Vol. 43A, No. 5, 2012, p. 1477-1486.Publication: Research - peer-review › Conference article – Annual report year: 2012
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TY - CONF
T1 - Phase Identification and Internal Stress Analysis of Steamside Oxides on Plant Exposed Superheater Tubes
A1 - Pantleon,Karen
A1 - Montgomery,Melanie
AU - Pantleon,Karen
AU - Montgomery,Melanie
PB - Springer New York LLC
PY - 2012
Y1 - 2012
N2 - During long-term, high-temperature exposure of superheater tubes in thermal power plants, various oxides are formed on the inner side (steamside) of the tubes, and oxide spallation is a serious problem for the power plant industry. Most often, oxidation in a steam atmosphere is investigated in laboratory experiments just mimicking the actual conditions in the power plant for simplified samples. On real plant-exposed superheater tubes, the steamside oxides are solely investigated microscopically. The feasibility of X-ray diffraction for the characterization of steamside oxidation on real plant-exposed superheater tubes was proven in the current work; the challenges for depth-resolved phase analysis and phase-specific residual stress analysis at the inner side of the tubes with concave surface curvature are discussed. Essential differences between the steamside oxides formed on two different steels typically applied for superheaters, ferritic-martensitic X20CrMoV12-1 and lean austenitic stainless steel TP347H, respectively, are revealed by X-ray diffraction.
AB - During long-term, high-temperature exposure of superheater tubes in thermal power plants, various oxides are formed on the inner side (steamside) of the tubes, and oxide spallation is a serious problem for the power plant industry. Most often, oxidation in a steam atmosphere is investigated in laboratory experiments just mimicking the actual conditions in the power plant for simplified samples. On real plant-exposed superheater tubes, the steamside oxides are solely investigated microscopically. The feasibility of X-ray diffraction for the characterization of steamside oxidation on real plant-exposed superheater tubes was proven in the current work; the challenges for depth-resolved phase analysis and phase-specific residual stress analysis at the inner side of the tubes with concave surface curvature are discussed. Essential differences between the steamside oxides formed on two different steels typically applied for superheaters, ferritic-martensitic X20CrMoV12-1 and lean austenitic stainless steel TP347H, respectively, are revealed by X-ray diffraction.
KW - MATERIALS
KW - METALLURGY
KW - OXIDATION-KINETICS
KW - FERRITIC STEELS
KW - WATER-VAPOR
KW - POWER-PLANT
KW - TEMPERATURE
KW - BEHAVIOR
KW - GROWTH
KW - STRAIN
KW - MICROSTRUCTURE
KW - DISTRIBUTIONS
UR - http://www.springerlink.com/content/7234537p3hv52365/
U2 - 10.1007/s11661-011-0874-x
DO - 10.1007/s11661-011-0874-x
JO - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
SN - 1073-5623
IS - 5
VL - 43A
SP - 1477
EP - 1486
ER -