Modelling the development of creep damage

The licon experience

Pertti Auerkari, Stuart Holdsworth, Juhani Rantala, Carinne Coussement, Roy Hack

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

Abstract

Many plant components are designed for long term operation at high temperature, where they are subjected to creep damage. Development of creep damage in the form of creep cavitation and cracking can be an important sign of expended life, but has been relatively tedious to study in laboratory environment. Consequently, material characteristic signature of creep damage has been mostly obtained from service exposed material from the plant. This is inconvenient particularly for new materials for which no long term testing data or service experience is available. The paper describes the LICON approach to induce service-like creep cavitation damage through multiaxial loading of feature specimens. Examples are shown and discussed for parent and welded 9% chromium steels P91, P92 and E911, as well as for dissimilar welds of 2¼Cr-1Mo (P22). The results demonstrate that unlike the traditional uniaxial testing, the selected approach can produce appropriate creep cavitation damage in high-ductility steels within a reasonable time to characterise new materials and to support in-service inspections.
Original languageEnglish
Title of host publicationBALTICA V
Subtitle of host publicationCondition and Life Management for Power Plants
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages609-620
Volume2
ISBN (Electronic)951-38-5717-4
ISBN (Print)951-38-5716-6
Publication statusPublished - 2001
MoE publication typeA4 Article in a conference publication
EventBALTICA V - Condition and Life Management for Power Plants - Porvoo, Finland
Duration: 6 Jun 20018 Jun 2001

Publication series

NameVTT Symposium
PublisherVTT
Number212
ISSN (Print)0357-9387
ISSN (Electronic)1455-0873

Conference

ConferenceBALTICA V - Condition and Life Management for Power Plants
Abbreviated titleBaltica V
CountryFinland
CityPorvoo
Period6/06/018/06/01

Fingerprint

Creep
Cavitation
Steel
Testing
Ductility
Chromium
Welds
Inspection
Temperature

Cite this

Auerkari, P., Holdsworth, S., Rantala, J., Coussement, C., & Hack, R. (2001). Modelling the development of creep damage: The licon experience. In BALTICA V: Condition and Life Management for Power Plants (Vol. 2, pp. 609-620). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 212
Auerkari, Pertti ; Holdsworth, Stuart ; Rantala, Juhani ; Coussement, Carinne ; Hack, Roy. / Modelling the development of creep damage : The licon experience. BALTICA V: Condition and Life Management for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2001. pp. 609-620 (VTT Symposium; No. 212).
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title = "Modelling the development of creep damage: The licon experience",
abstract = "Many plant components are designed for long term operation at high temperature, where they are subjected to creep damage. Development of creep damage in the form of creep cavitation and cracking can be an important sign of expended life, but has been relatively tedious to study in laboratory environment. Consequently, material characteristic signature of creep damage has been mostly obtained from service exposed material from the plant. This is inconvenient particularly for new materials for which no long term testing data or service experience is available. The paper describes the LICON approach to induce service-like creep cavitation damage through multiaxial loading of feature specimens. Examples are shown and discussed for parent and welded 9{\%} chromium steels P91, P92 and E911, as well as for dissimilar welds of 2¼Cr-1Mo (P22). The results demonstrate that unlike the traditional uniaxial testing, the selected approach can produce appropriate creep cavitation damage in high-ductility steels within a reasonable time to characterise new materials and to support in-service inspections.",
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Auerkari, P, Holdsworth, S, Rantala, J, Coussement, C & Hack, R 2001, Modelling the development of creep damage: The licon experience. in BALTICA V: Condition and Life Management for Power Plants. vol. 2, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 212, pp. 609-620, BALTICA V - Condition and Life Management for Power Plants, Porvoo, Finland, 6/06/01.

Modelling the development of creep damage : The licon experience. / Auerkari, Pertti; Holdsworth, Stuart; Rantala, Juhani; Coussement, Carinne; Hack, Roy.

BALTICA V: Condition and Life Management for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2001. p. 609-620 (VTT Symposium; No. 212).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AU - Auerkari, Pertti

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AU - Rantala, Juhani

AU - Coussement, Carinne

AU - Hack, Roy

PY - 2001

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N2 - Many plant components are designed for long term operation at high temperature, where they are subjected to creep damage. Development of creep damage in the form of creep cavitation and cracking can be an important sign of expended life, but has been relatively tedious to study in laboratory environment. Consequently, material characteristic signature of creep damage has been mostly obtained from service exposed material from the plant. This is inconvenient particularly for new materials for which no long term testing data or service experience is available. The paper describes the LICON approach to induce service-like creep cavitation damage through multiaxial loading of feature specimens. Examples are shown and discussed for parent and welded 9% chromium steels P91, P92 and E911, as well as for dissimilar welds of 2¼Cr-1Mo (P22). The results demonstrate that unlike the traditional uniaxial testing, the selected approach can produce appropriate creep cavitation damage in high-ductility steels within a reasonable time to characterise new materials and to support in-service inspections.

AB - Many plant components are designed for long term operation at high temperature, where they are subjected to creep damage. Development of creep damage in the form of creep cavitation and cracking can be an important sign of expended life, but has been relatively tedious to study in laboratory environment. Consequently, material characteristic signature of creep damage has been mostly obtained from service exposed material from the plant. This is inconvenient particularly for new materials for which no long term testing data or service experience is available. The paper describes the LICON approach to induce service-like creep cavitation damage through multiaxial loading of feature specimens. Examples are shown and discussed for parent and welded 9% chromium steels P91, P92 and E911, as well as for dissimilar welds of 2¼Cr-1Mo (P22). The results demonstrate that unlike the traditional uniaxial testing, the selected approach can produce appropriate creep cavitation damage in high-ductility steels within a reasonable time to characterise new materials and to support in-service inspections.

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VL - 2

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Auerkari P, Holdsworth S, Rantala J, Coussement C, Hack R. Modelling the development of creep damage: The licon experience. In BALTICA V: Condition and Life Management for Power Plants. Vol. 2. Espoo: VTT Technical Research Centre of Finland. 2001. p. 609-620. (VTT Symposium; No. 212).