Phase Identification and Internal Stress Analysis of Steamside Oxides on Plant Exposed Superheater Tubes

Publication: Research - peer-reviewConference article – Annual report year: 2012

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@article{4432a2ce8c134c5580d208547c21bf3d,
title = "Phase Identification and Internal Stress Analysis of Steamside Oxides on Plant Exposed Superheater Tubes",
publisher = "Springer New York LLC",
author = "Karen Pantleon and Melanie Montgomery",
year = "2012",
doi = "10.1007/s11661-011-0874-x",
volume = "43A",
number = "5",
pages = "1477--1486",
journal = "Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science",
issn = "1073-5623",

}

RIS

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 -