Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing

Roman Mouginot; Teemu Sarikka; Mikko Heikkilä; Mykola Ivanchenko; Unto Tapper; Ulla Ehrnstén; Hannu Hänninen

doi:10.1007/978-3-319-67244-1_21

Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing

Roman Mouginot^*, Teemu Sarikka, Mikko Heikkilä, Mykola Ivanchenko, Unto Tapper, Ulla Ehrnstén, Hannu Hänninen

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Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussa › Conference article in proceedings › Scientific › vertaisarvioitu

2 Sitaatiot (Scopus)

Abstrakti

Thermal ageing promotes intergranular carbide precipitation and atomic ordering reaction in most commercial nickel-base alloys, and it affects the long-term primary water stress corrosion cracking (PWSCC) resistance of pressurized water reactor components. Alloy 690 with 9.8 wt% Fe was solution annealed and heat-treated at low temperature, then aged between 350 and 550, °C for 10,000, h. No direct observation of ordering was possible, but variations in hardness and lattice parameter suggested the formation of short-range ordering (SRO) with a peak level upon ageing at 420, °C, while a disordering reaction occurred at higher temperatures. Heat treatment induced ordering before thermal ageing was compared to the solution-annealed state. Thermal ageing resulted in the precipitation of Cr-rich M₂₃C₆ carbides at grain boundaries and twin boundaries. Although no link between SRO and an increase in strain localization was observed, the combination of intergranular carbide formation and SRO over longer ageing times was deemed detrimental to the PWSCC resistance of Alloy 690 TT.

Alkuperäiskieli	Englanti
Otsikko	Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors
Kustantaja	Springer
Sivut	321-334
Sivumäärä	14
Vuosikerta	Part F9
ISBN (painettu)	9783319672434
DOI - pysyväislinkit	https://doi.org/10.1007/978-3-319-67244-1_21
Tila	Julkaistu - 2018
OKM-julkaisutyyppi	A4 Artikkeli konferenssijulkaisussa
Tapahtuma	International Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors - Portland, Yhdysvallat Kesto: 13 elok. 2017 → 17 elok. 2017 Konferenssinumero: 18

Julkaisusarja

Nimi	Minerals, Metals and Materials Series
Vuosikerta	Part F9
ISSN (painettu)	2367-1181
ISSN (elektroninen)	2367-1696

Conference

Conference	International Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors
Maa/Alue	Yhdysvallat
Kaupunki	Portland
Ajanjakso	13/08/2017 → 17/08/2017

Pääsy asiakirjaan

10.1007/978-3-319-67244-1_21

Muut tiedostot ja linkit

Link to publication in Scopus

Siteeraa tätä

Mouginot, R., Sarikka, T., Heikkilä, M., Ivanchenko, M., Tapper, U., Ehrnstén, U., & Hänninen, H. (2018). Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing. teoksessa Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (Vuosikerta Part F9, Sivut 321-334). (Minerals, Metals and Materials Series; Vuosikerta Part F9). Springer. https://doi.org/10.1007/978-3-319-67244-1_21

Mouginot, Roman ; Sarikka, Teemu ; Heikkilä, Mikko et al. / Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing. Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Vuosikerta Part F9 Springer, 2018. Sivut 321-334 (Minerals, Metals and Materials Series).

@inproceedings{e9a3f7d356794664acf3b67c281e23ad,

title = "Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing",

abstract = "Thermal ageing promotes intergranular carbide precipitation and atomic ordering reaction in most commercial nickel-base alloys, and it affects the long-term primary water stress corrosion cracking (PWSCC) resistance of pressurized water reactor components. Alloy 690 with 9.8 wt% Fe was solution annealed and heat-treated at low temperature, then aged between 350 and 550, °C for 10,000, h. No direct observation of ordering was possible, but variations in hardness and lattice parameter suggested the formation of short-range ordering (SRO) with a peak level upon ageing at 420, °C, while a disordering reaction occurred at higher temperatures. Heat treatment induced ordering before thermal ageing was compared to the solution-annealed state. Thermal ageing resulted in the precipitation of Cr-rich M23C6 carbides at grain boundaries and twin boundaries. Although no link between SRO and an increase in strain localization was observed, the combination of intergranular carbide formation and SRO over longer ageing times was deemed detrimental to the PWSCC resistance of Alloy 690 TT.",

keywords = "Alloy 690, Cold work, NiCr, Short-range ordering, Thermal ageing, Thermal treatment",

author = "Roman Mouginot and Teemu Sarikka and Mikko Heikkil{\"a} and Mykola Ivanchenko and Unto Tapper and Ulla Ehrnst{\'e}n and Hannu H{\"a}nninen",

year = "2018",

doi = "10.1007/978-3-319-67244-1_21",

language = "English",

isbn = "9783319672434",

volume = "Part F9",

series = "Minerals, Metals and Materials Series",

publisher = "Springer",

pages = "321--334",

booktitle = "Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors",

address = "Germany",

note = "International Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors ; Conference date: 13-08-2017 Through 17-08-2017",

}

Mouginot, R, Sarikka, T, Heikkilä, M, Ivanchenko, M, Tapper, U, Ehrnstén, U & Hänninen, H 2018, Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing. julkaisussa Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Vuosikerta Part F9, Minerals, Metals and Materials Series, Vuosikerta Part F9, Springer, Sivut 321-334, International Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors, Portland, Oregon, Yhdysvallat, 13/08/2017. https://doi.org/10.1007/978-3-319-67244-1_21

Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing. / Mouginot, Roman; Sarikka, Teemu; Heikkilä, Mikko et al.
Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Vuosikerta Part F9 Springer, 2018. s. 321-334 (Minerals, Metals and Materials Series; Vuosikerta Part F9).

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussa › Conference article in proceedings › Scientific › vertaisarvioitu

TY - GEN

T1 - Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing

AU - Mouginot, Roman

AU - Sarikka, Teemu

AU - Heikkilä, Mikko

AU - Ivanchenko, Mykola

AU - Tapper, Unto

AU - Ehrnstén, Ulla

AU - Hänninen, Hannu

N1 - Conference code: 18

PY - 2018

Y1 - 2018

N2 - Thermal ageing promotes intergranular carbide precipitation and atomic ordering reaction in most commercial nickel-base alloys, and it affects the long-term primary water stress corrosion cracking (PWSCC) resistance of pressurized water reactor components. Alloy 690 with 9.8 wt% Fe was solution annealed and heat-treated at low temperature, then aged between 350 and 550, °C for 10,000, h. No direct observation of ordering was possible, but variations in hardness and lattice parameter suggested the formation of short-range ordering (SRO) with a peak level upon ageing at 420, °C, while a disordering reaction occurred at higher temperatures. Heat treatment induced ordering before thermal ageing was compared to the solution-annealed state. Thermal ageing resulted in the precipitation of Cr-rich M23C6 carbides at grain boundaries and twin boundaries. Although no link between SRO and an increase in strain localization was observed, the combination of intergranular carbide formation and SRO over longer ageing times was deemed detrimental to the PWSCC resistance of Alloy 690 TT.

AB - Thermal ageing promotes intergranular carbide precipitation and atomic ordering reaction in most commercial nickel-base alloys, and it affects the long-term primary water stress corrosion cracking (PWSCC) resistance of pressurized water reactor components. Alloy 690 with 9.8 wt% Fe was solution annealed and heat-treated at low temperature, then aged between 350 and 550, °C for 10,000, h. No direct observation of ordering was possible, but variations in hardness and lattice parameter suggested the formation of short-range ordering (SRO) with a peak level upon ageing at 420, °C, while a disordering reaction occurred at higher temperatures. Heat treatment induced ordering before thermal ageing was compared to the solution-annealed state. Thermal ageing resulted in the precipitation of Cr-rich M23C6 carbides at grain boundaries and twin boundaries. Although no link between SRO and an increase in strain localization was observed, the combination of intergranular carbide formation and SRO over longer ageing times was deemed detrimental to the PWSCC resistance of Alloy 690 TT.

KW - Alloy 690

KW - Cold work

KW - NiCr

KW - Short-range ordering

KW - Thermal ageing

KW - Thermal treatment

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U2 - 10.1007/978-3-319-67244-1_21

DO - 10.1007/978-3-319-67244-1_21

M3 - Conference article in proceedings

AN - SCOPUS:85042516368

SN - 9783319672434

VL - Part F9

T3 - Minerals, Metals and Materials Series

SP - 321

EP - 334

BT - Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors

PB - Springer

T2 - International Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors

Y2 - 13 August 2017 through 17 August 2017

ER -

Mouginot R, Sarikka T, Heikkilä M, Ivanchenko M, Tapper U, Ehrnstén U et al. Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing. julkaisussa Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Vuosikerta Part F9. Springer. 2018. s. 321-334. (Minerals, Metals and Materials Series). doi: 10.1007/978-3-319-67244-1_21

Development of short-range order and intergranular carbide precipitation in alloy 690 TT upon thermal ageing

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