Investigations on aged Ti-stabilised stainless steels

Ulla Ehrnstén, Päivi Karjalainen-Roikonen, Pertti Nenonen, Ritva Korhonen, Boris T. Timofeev, Alexandr A. Bloomin

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

1 Citation (Scopus)

Abstract

Mechanical and microstructural properties of cast material of type O8X8H10TL and wrought and welded stainless steel pipe material of type O8X8H10T have been determined, aged at NPP operation temperature for about 100 000 h and 200 000 h, respectively. The mechanical properties were determined using tensile testing, impact energy determination and fracture resistance testing. The microstructures were studied using optical, scanning and transmission electron microscopy. The mechanical properties of the cast Ti-stabilised stainless steel material are evaluated to be only slightly affected by long term (~100 000 hours) operation at NPP operation temperature. Also the effect of even longer (~200 000 hours) operation on wrought Ti-stabilised pipe material is very small, as the properties of the aged material are within the normal range of as-manufactured material. The mechanical properties of the Mo-alloyed stainless steel weld metal after ~200 000 hours of operation are still good, although indications of changes due to thermal ageing were observed.
Original languageEnglish
Title of host publicationPlant Life Management
Subtitle of host publicationProgress for structural integrity
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages241-251
ISBN (Electronic)951-38-6281-X
ISBN (Print)951-38-6280-1
Publication statusPublished - 2003
MoE publication typeB3 Non-refereed article in conference proceedings
EventPlant Life Management: Progress for structural integrity - Espoo, Finland
Duration: 1 Jan 20021 Jan 2002

Publication series

NameVTT Symposium
PublisherVTT
Number227
ISSN (Print)0357-9387
ISSN (Electronic)1455-0873

Seminar

SeminarPlant Life Management
CountryFinland
CityEspoo
Period1/01/021/01/02

Fingerprint

Stainless steel
Mechanical properties
Thermal aging
Tensile testing
Steel pipe
Light transmission
Fracture toughness
Welds
Pipe
Transmission electron microscopy
Scanning
Temperature
Microstructure
Scanning electron microscopy
Testing
Metals

Cite this

Ehrnstén, U., Karjalainen-Roikonen, P., Nenonen, P., Korhonen, R., Timofeev, B. T., & Bloomin, A. A. (2003). Investigations on aged Ti-stabilised stainless steels. In Plant Life Management: Progress for structural integrity (pp. 241-251). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 227
Ehrnstén, Ulla ; Karjalainen-Roikonen, Päivi ; Nenonen, Pertti ; Korhonen, Ritva ; Timofeev, Boris T. ; Bloomin, Alexandr A. / Investigations on aged Ti-stabilised stainless steels. Plant Life Management: Progress for structural integrity. Espoo : VTT Technical Research Centre of Finland, 2003. pp. 241-251 (VTT Symposium; No. 227).
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abstract = "Mechanical and microstructural properties of cast material of type O8X8H10TL and wrought and welded stainless steel pipe material of type O8X8H10T have been determined, aged at NPP operation temperature for about 100 000 h and 200 000 h, respectively. The mechanical properties were determined using tensile testing, impact energy determination and fracture resistance testing. The microstructures were studied using optical, scanning and transmission electron microscopy. The mechanical properties of the cast Ti-stabilised stainless steel material are evaluated to be only slightly affected by long term (~100 000 hours) operation at NPP operation temperature. Also the effect of even longer (~200 000 hours) operation on wrought Ti-stabilised pipe material is very small, as the properties of the aged material are within the normal range of as-manufactured material. The mechanical properties of the Mo-alloyed stainless steel weld metal after ~200 000 hours of operation are still good, although indications of changes due to thermal ageing were observed.",
author = "Ulla Ehrnst{\'e}n and P{\"a}ivi Karjalainen-Roikonen and Pertti Nenonen and Ritva Korhonen and Timofeev, {Boris T.} and Bloomin, {Alexandr A.}",
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Ehrnstén, U, Karjalainen-Roikonen, P, Nenonen, P, Korhonen, R, Timofeev, BT & Bloomin, AA 2003, Investigations on aged Ti-stabilised stainless steels. in Plant Life Management: Progress for structural integrity. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 227, pp. 241-251, Plant Life Management, Espoo, Finland, 1/01/02.

Investigations on aged Ti-stabilised stainless steels. / Ehrnstén, Ulla; Karjalainen-Roikonen, Päivi; Nenonen, Pertti; Korhonen, Ritva; Timofeev, Boris T.; Bloomin, Alexandr A.

Plant Life Management: Progress for structural integrity. Espoo : VTT Technical Research Centre of Finland, 2003. p. 241-251 (VTT Symposium; No. 227).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

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T1 - Investigations on aged Ti-stabilised stainless steels

AU - Ehrnstén, Ulla

AU - Karjalainen-Roikonen, Päivi

AU - Nenonen, Pertti

AU - Korhonen, Ritva

AU - Timofeev, Boris T.

AU - Bloomin, Alexandr A.

N1 - Project code: H2SU00363

PY - 2003

Y1 - 2003

N2 - Mechanical and microstructural properties of cast material of type O8X8H10TL and wrought and welded stainless steel pipe material of type O8X8H10T have been determined, aged at NPP operation temperature for about 100 000 h and 200 000 h, respectively. The mechanical properties were determined using tensile testing, impact energy determination and fracture resistance testing. The microstructures were studied using optical, scanning and transmission electron microscopy. The mechanical properties of the cast Ti-stabilised stainless steel material are evaluated to be only slightly affected by long term (~100 000 hours) operation at NPP operation temperature. Also the effect of even longer (~200 000 hours) operation on wrought Ti-stabilised pipe material is very small, as the properties of the aged material are within the normal range of as-manufactured material. The mechanical properties of the Mo-alloyed stainless steel weld metal after ~200 000 hours of operation are still good, although indications of changes due to thermal ageing were observed.

AB - Mechanical and microstructural properties of cast material of type O8X8H10TL and wrought and welded stainless steel pipe material of type O8X8H10T have been determined, aged at NPP operation temperature for about 100 000 h and 200 000 h, respectively. The mechanical properties were determined using tensile testing, impact energy determination and fracture resistance testing. The microstructures were studied using optical, scanning and transmission electron microscopy. The mechanical properties of the cast Ti-stabilised stainless steel material are evaluated to be only slightly affected by long term (~100 000 hours) operation at NPP operation temperature. Also the effect of even longer (~200 000 hours) operation on wrought Ti-stabilised pipe material is very small, as the properties of the aged material are within the normal range of as-manufactured material. The mechanical properties of the Mo-alloyed stainless steel weld metal after ~200 000 hours of operation are still good, although indications of changes due to thermal ageing were observed.

M3 - Conference article in proceedings

SN - 951-38-6280-1

T3 - VTT Symposium

SP - 241

EP - 251

BT - Plant Life Management

PB - VTT Technical Research Centre of Finland

CY - Espoo

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Ehrnstén U, Karjalainen-Roikonen P, Nenonen P, Korhonen R, Timofeev BT, Bloomin AA. Investigations on aged Ti-stabilised stainless steels. In Plant Life Management: Progress for structural integrity. Espoo: VTT Technical Research Centre of Finland. 2003. p. 241-251. (VTT Symposium; No. 227).