Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C

Roman Mouginot; Teemu Sarikka; Ulla Ehrnstén; Young Suk Kim; Sung Soo Kim; Hannu Hänninen

Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C

Roman Mouginot, Teemu Sarikka, Ulla Ehrnstén, Young Suk Kim, Sung Soo Kim, Hannu Hänninen

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

Alloy 690 is used in critical components of nuclear power systems. It has a high intergranular stress corrosion cracking (IGSCC) resistance, but questions remain concerning its long-term primary water stress corrosion cracking (PWSCC) resistance during the service life of pressurized water reactor (PWR) components. To study the effect of thermal ageing, four conditions of Alloy 690 (solution annealed, coldrolled and/or heat-treated) were aged at 420, 475 and 550 °C for 10 000 h and characterized by SEM, EBSD and nanoindentation. Thermal ageing of Alloy 690 triggered intergranular (IG) carbide precipitation and all conditions showed evidence of short-range ordering (SRO), with the start of a disordering reaction at 475 °C. Prior heat treatment induced ordering prior to thermal ageing, as compared to water-quenched specimens. IG carbide precipitation increased with increasing ageing temperature, as well as diffusioninduced grain boundary migration (DIGM).

Original language	English
Title of host publication	Baltica X
Subtitle of host publication	International Conference on Life Management and Maintenance for Power Plants
Editors	Pertti Auerkari
Place of Publication	Espoo
Publisher	VTT Technical Research Centre of Finland
Number of pages	8
ISBN (Electronic)	978-951-38-8436-9, 978-951-38-8435-2
Publication status	Published - 2016
MoE publication type	A4 Article in a conference publication
Event	BALTICA X - International Conference on Life Management and Maintenance for Power Plants - Cruise, Helsinki-Stockholm, Finland Duration: 7 Jun 2016 → 9 Jun 2016

Publication series

Series	VTT Technology
Volume	261
ISSN	2242-1211

Conference

Conference	BALTICA X - International Conference on Life Management and Maintenance for Power Plants
Abbreviated title	Baltica X
Country/Territory	Finland
City	Helsinki-Stockholm
Period	7/06/16 → 9/06/16

Keywords

Alloy 690
thermal ageing
short-range ordering
Ni2Cr
carbide precipitation
heat treatment
cold work

Access to Document

https://publications.vtt.fi/pdf/technology/2016/T261.pdf

1 Book (editor)

Baltica X - International Conference on Life, Management and maintenance for Power Plants
Auerkari, P. (ed.), 2016, Espoo: VTT Technical Research Centre of Finland. 620 p. (VTT Technology; No. 261).
Research output: Book/Report › Book (editor) › Scientific › peer-review

Open Access

Cite this

Mouginot, R., Sarikka, T., Ehrnstén, U., Kim, Y. S., Kim, S. S., & Hänninen, H. (2016). Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C. In P. Auerkari (Ed.), Baltica X: International Conference on Life Management and Maintenance for Power Plants VTT Technical Research Centre of Finland. https://publications.vtt.fi/pdf/technology/2016/T261.pdf

@inproceedings{15d27b968d794f91bc069d6dd272dd58,

title = "Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C",

abstract = "Alloy 690 is used in critical components of nuclear power systems. It has a high intergranular stress corrosion cracking (IGSCC) resistance, but questions remain concerning its long-term primary water stress corrosion cracking (PWSCC) resistance during the service life of pressurized water reactor (PWR) components. To study the effect of thermal ageing, four conditions of Alloy 690 (solution annealed, coldrolled and/or heat-treated) were aged at 420, 475 and 550 °C for 10 000 h and characterized by SEM, EBSD and nanoindentation. Thermal ageing of Alloy 690 triggered intergranular (IG) carbide precipitation and all conditions showed evidence of short-range ordering (SRO), with the start of a disordering reaction at 475 °C. Prior heat treatment induced ordering prior to thermal ageing, as compared to water-quenched specimens. IG carbide precipitation increased with increasing ageing temperature, as well as diffusioninduced grain boundary migration (DIGM).",

keywords = "Alloy 690, thermal ageing, short-range ordering, Ni2Cr, carbide precipitation, heat treatment, cold work",

author = "Roman Mouginot and Teemu Sarikka and Ulla Ehrnst{\'e}n and Kim, {Young Suk} and Kim, {Sung Soo} and Hannu H{\"a}nninen",

year = "2016",

language = "English",

series = "VTT Technology",

publisher = "VTT Technical Research Centre of Finland",

editor = "Pertti Auerkari",

booktitle = "Baltica X",

address = "Finland",

note = "BALTICA X - International Conference on Life Management and Maintenance for Power Plants, Baltica X ; Conference date: 07-06-2016 Through 09-06-2016",

}

Mouginot, R, Sarikka, T, Ehrnstén, U, Kim, YS, Kim, SS & Hänninen, H 2016, Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C. in P Auerkari (ed.), Baltica X: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, Espoo, VTT Technology, vol. 261, BALTICA X - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 7/06/16. <https://publications.vtt.fi/pdf/technology/2016/T261.pdf>

Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C. / Mouginot, Roman; Sarikka, Teemu; Ehrnstén, Ulla et al.
Baltica X: International Conference on Life Management and Maintenance for Power Plants. ed. / Pertti Auerkari. Espoo: VTT Technical Research Centre of Finland, 2016. (VTT Technology, Vol. 261).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C

AU - Mouginot, Roman

AU - Sarikka, Teemu

AU - Ehrnstén, Ulla

AU - Kim, Young Suk

AU - Kim, Sung Soo

AU - Hänninen, Hannu

PY - 2016

Y1 - 2016

N2 - Alloy 690 is used in critical components of nuclear power systems. It has a high intergranular stress corrosion cracking (IGSCC) resistance, but questions remain concerning its long-term primary water stress corrosion cracking (PWSCC) resistance during the service life of pressurized water reactor (PWR) components. To study the effect of thermal ageing, four conditions of Alloy 690 (solution annealed, coldrolled and/or heat-treated) were aged at 420, 475 and 550 °C for 10 000 h and characterized by SEM, EBSD and nanoindentation. Thermal ageing of Alloy 690 triggered intergranular (IG) carbide precipitation and all conditions showed evidence of short-range ordering (SRO), with the start of a disordering reaction at 475 °C. Prior heat treatment induced ordering prior to thermal ageing, as compared to water-quenched specimens. IG carbide precipitation increased with increasing ageing temperature, as well as diffusioninduced grain boundary migration (DIGM).

AB - Alloy 690 is used in critical components of nuclear power systems. It has a high intergranular stress corrosion cracking (IGSCC) resistance, but questions remain concerning its long-term primary water stress corrosion cracking (PWSCC) resistance during the service life of pressurized water reactor (PWR) components. To study the effect of thermal ageing, four conditions of Alloy 690 (solution annealed, coldrolled and/or heat-treated) were aged at 420, 475 and 550 °C for 10 000 h and characterized by SEM, EBSD and nanoindentation. Thermal ageing of Alloy 690 triggered intergranular (IG) carbide precipitation and all conditions showed evidence of short-range ordering (SRO), with the start of a disordering reaction at 475 °C. Prior heat treatment induced ordering prior to thermal ageing, as compared to water-quenched specimens. IG carbide precipitation increased with increasing ageing temperature, as well as diffusioninduced grain boundary migration (DIGM).

KW - Alloy 690

KW - thermal ageing

KW - short-range ordering

KW - Ni2Cr

KW - carbide precipitation

KW - heat treatment

KW - cold work

M3 - Conference article in proceedings

T3 - VTT Technology

BT - Baltica X

A2 - Auerkari, Pertti

PB - VTT Technical Research Centre of Finland

CY - Espoo

T2 - BALTICA X - International Conference on Life Management and Maintenance for Power Plants

Y2 - 7 June 2016 through 9 June 2016

ER -

Short-range ordering of Alloy 690 aged for 10 000 h at 420, 475 and 550 °C

Abstract

Publication series

Conference

Keywords

Access to Document

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Research output

Baltica X - International Conference on Life, Management and maintenance for Power Plants

Cite this