bibo:abstract
  • The grain boundary etching method as a method for assessing degradation of structural materials has received much attention because it is simple, inexpensive and easy to apply to real components. In this study, the effectiveness of the method is verified by successfully applying the technique to in-service components of aged fossil power plants such as main steam pipes, boiler headers and turbine rotors. A new degradation parameter, intersecting number ratio(<TEX>$$N_i$$</TEX>/<TEX>$$N_o$$</TEX>), is employed. The intersecting number ratio(<TEX>$$N_i$$</TEX>/<TEX>$$N_o$$</TEX>) is defined as the ratio of intersection number(<TEX>$$N_i$$</TEX>) obtained from 5-minute picric acid etched surface to the number(<TEX>$$N_o$$</TEX>) obtained from nital etched surface. Two kinds of test materials, 2.25Cr-1Mo steel and 1Cr-1Mo-0.25V steel, were artificially thermal-aged at 630℃ in different levels of degradation., (<TEX>$$N_i$$</TEX>/<TEX>$$N_o$$</TEX>) were measured. And, correlations between the measured values and LMP values calculated from aging temperature and aging time were sought. To check the validity of the correlations obtained in laboratory, similar data were measured from service components in four old Korean fossil power plants. These on-site measurement data were in good correlation with those obtained in the laboratory. (rdf:langString) (en)
nlon:biographicalNote
  • 윤기봉, 회원, 중앙대학교 기계설계학과 (xsd:string)
  • 정세희, 회원, 전북대학교 정밀기계공학과 (xsd:string)
  • 한상인, 한국가스안전공사 안전진단처 장치검사부 (xsd:string)
nlon:classificationNumberOfNLK
  • 550.5 (xsd:string)
nlon:containedIn
dc:creator
  • 윤기봉 (xsd:string)
  • 정세희 (xsd:string)
  • 한상인 (xsd:string)
dcterms:creator
nlon:datePublished
  • 2021-01-30T23:37:12 (xsd:dateTime)
dcterms:description
  • Assessment of residual life in-service fossil power plant components using grain boundary etching method (xsd:string)
bibframe:extent
  • 26 cm (xsd:string)
  • p. 22-31 (xsd:string)
dcterms:isPartOf
nlon:issuedYear
  • 1997 (xsd:string)
nlon:itemNumberOfNLK
  • 대446 (xsd:string)
rdfs:label
  • 입계부식법에 의한 사용중인 화력발전소 요소의 잔여수명평가 / 한상인, 윤기봉,정세희 (xsd:string)
dcterms:language
dc:subject
  • GEM (xsd:string)
  • Grain boundary etching method (xsd:string)
  • Intersecting number ratio (xsd:string)
  • LMP (xsd:string)
  • Larson miller parameter (xsd:string)
  • Larson miller 변수 (xsd:string)
  • Material degradation (xsd:string)
  • 격자절단비 (xsd:string)
  • 입계부식법 (xsd:string)
  • 재질열화 (xsd:string)
dcterms:title
  • 입계부식법에 의한 사용중인 화력발전소 요소의 잔여수명평가 (xsd:string)
rdf:type
nlon:volumeOfNLK
  • 21(1) (xsd:string)