Assessment of the thermal damage in the superalloy GTD-111

Kjeld Borggreen, Pertti Auerkari

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

2 Citations (Scopus)

Abstract

Samples of the superalloy GTD-111 used for blades in gas turbines have been artificially thermal damaged by use of either isothermal or isochronous heat treatment up to the point of incipient melting. The microstructure has been assessed by use of SEM and subsequent image analysis of both the large cuboidal g'-particles and the fine ageing g'-particles. The area density of the fine ageing g'-particles in the core of the dendrites may be used for estimation of the stage of thermal damage up to the point of damage, where all fine particles are dissolved. The generated atlas of microstructures may be helpful for giving rough estimates of the thermal history up to the stage of incipient melting.
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
Pages125-138
Volume1
ISBN (Electronic)951-38-5715-8
ISBN (Print)951-38-5714-X
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

SeriesVTT Symposium
Number211
ISSN0357-9387

Conference

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

Fingerprint

damage
microstructure
melting
image analysis
atlas
turbine
scanning electron microscopy
particle
history
gas

Cite this

Borggreen, K., & Auerkari, P. (2001). Assessment of the thermal damage in the superalloy GTD-111. In BALTICA V: Condition and Life Management for Power Plants (Vol. 1, pp. 125-138). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 211
Borggreen, Kjeld ; Auerkari, Pertti. / Assessment of the thermal damage in the superalloy GTD-111. BALTICA V: Condition and Life Management for Power Plants. Vol. 1 Espoo : VTT Technical Research Centre of Finland, 2001. pp. 125-138 (VTT Symposium; No. 211).
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Borggreen, K & Auerkari, P 2001, Assessment of the thermal damage in the superalloy GTD-111. in BALTICA V: Condition and Life Management for Power Plants. vol. 1, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 211, pp. 125-138, BALTICA V - Condition and Life Management for Power Plants, Porvoo, Finland, 6/06/01.

Assessment of the thermal damage in the superalloy GTD-111. / Borggreen, Kjeld; Auerkari, Pertti.

BALTICA V: Condition and Life Management for Power Plants. Vol. 1 Espoo : VTT Technical Research Centre of Finland, 2001. p. 125-138 (VTT Symposium; No. 211).

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

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AB - Samples of the superalloy GTD-111 used for blades in gas turbines have been artificially thermal damaged by use of either isothermal or isochronous heat treatment up to the point of incipient melting. The microstructure has been assessed by use of SEM and subsequent image analysis of both the large cuboidal g'-particles and the fine ageing g'-particles. The area density of the fine ageing g'-particles in the core of the dendrites may be used for estimation of the stage of thermal damage up to the point of damage, where all fine particles are dissolved. The generated atlas of microstructures may be helpful for giving rough estimates of the thermal history up to the stage of incipient melting.

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Borggreen K, Auerkari P. Assessment of the thermal damage in the superalloy GTD-111. In BALTICA V: Condition and Life Management for Power Plants. Vol. 1. Espoo: VTT Technical Research Centre of Finland. 2001. p. 125-138. (VTT Symposium; No. 211).