Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld

Matias Ahonen; Sebastian Lindqvist; Teemu Sarikka; Jari Lydman; Roman Mouginot; Ulla Ehrnstén; Pekka Nevasmaa; Hannu Hänninen

doi:10.1007/978-3-030-04639-2_132

Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld

Matias Ahonen^* (Corresponding author), Sebastian Lindqvist, Teemu Sarikka, Jari Lydman, Roman Mouginot, Ulla Ehrnstén, Pekka Nevasmaa, Hannu Hänninen

^*Corresponding author for this work

Aalto University

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

2 Citations (Scopus)

Abstract

Determination of the fracture toughness properties and thermal aging behavior of dissimilar metal weld (DMW) joints is of utmost importance for successful structural integrity and lifetime analyses. This paper presents results from fracture resistance (J-R), fracture toughness (T ₀ ) and Charpy-V impact toughness tests as well as fractography performed for an industrially manufactured narrow-gap DMW mock-up (SA508-Alloy 52-AISI 316L). Tests were performed on post-weld heat treated, 5000 h aged and 10,000 h aged material. The results show that this DMW is tough at the SA 508-Alloy 52 interface, which typically is the weakest zone of a DMW. The DMW joint maintains its high fracture resistance also after thermal aging. Crack propagates for a large part in the carbon-depleted zone (CDZ) of SA 508 but deflects occasionally to the Alloy 52 side due to small weld defects in µm scale. Ductile-to-brittle transition temperature determined from Charpy-V impact toughness tests increases due to thermal aging, but only to a minor extent. No significant change is observed for the T ₀ transition temperature due to aging.

Original language	English
Title of host publication	Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors
Editors	John H. Jackson, Denise Paraventi, Michael Wright
Publisher	Springer
Pages	1949-1963
Number of pages	15
ISBN (Electronic)	978-3-030-04639-2
ISBN (Print)	978-3-030-04638-5
DOIs	https://doi.org/10.1007/978-3-030-04639-2_132
Publication status	Published - 2019
MoE publication type	A4 Article in a conference publication
Event	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 - Boston, United States Duration: 18 Aug 2019 → 22 Aug 2019

Conference

Conference	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019
Country/Territory	United States
City	Boston
Period	18/08/19 → 22/08/19

Keywords

Aging
Dissimilar metal weld
Microstructural characterization
Ni-base alloy

Access to Document

10.1007/978-3-030-04639-2_132

Cite this

Ahonen, M., Lindqvist, S., Sarikka, T., Lydman, J., Mouginot, R., Ehrnstén, U., Nevasmaa, P., & Hänninen, H. (2019). Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld. In J. H. Jackson, D. Paraventi, & M. Wright (Eds.), Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (pp. 1949-1963). Springer. https://doi.org/10.1007/978-3-030-04639-2_132

Ahonen, Matias ; Lindqvist, Sebastian ; Sarikka, Teemu et al. / Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld. Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. editor / John H. Jackson ; Denise Paraventi ; Michael Wright. Springer, 2019. pp. 1949-1963

@inproceedings{a5d1704222d542b7a50326aac2e4c427,

title = "Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld",

abstract = " Determination of the fracture toughness properties and thermal aging behavior of dissimilar metal weld (DMW) joints is of utmost importance for successful structural integrity and lifetime analyses. This paper presents results from fracture resistance (J-R), fracture toughness (T 0 ) and Charpy-V impact toughness tests as well as fractography performed for an industrially manufactured narrow-gap DMW mock-up (SA508-Alloy 52-AISI 316L). Tests were performed on post-weld heat treated, 5000 h aged and 10,000 h aged material. The results show that this DMW is tough at the SA 508-Alloy 52 interface, which typically is the weakest zone of a DMW. The DMW joint maintains its high fracture resistance also after thermal aging. Crack propagates for a large part in the carbon-depleted zone (CDZ) of SA 508 but deflects occasionally to the Alloy 52 side due to small weld defects in µm scale. Ductile-to-brittle transition temperature determined from Charpy-V impact toughness tests increases due to thermal aging, but only to a minor extent. No significant change is observed for the T 0 transition temperature due to aging.",

keywords = "Aging, Dissimilar metal weld, Microstructural characterization, Ni-base alloy",

author = "Matias Ahonen and Sebastian Lindqvist and Teemu Sarikka and Jari Lydman and Roman Mouginot and Ulla Ehrnst{\'e}n and Pekka Nevasmaa and Hannu H{\"a}nninen",

note = "Publisher Copyright: {\textcopyright} 2019, The Minerals, Metals & Materials Society.; 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 ; Conference date: 18-08-2019 Through 22-08-2019",

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doi = "10.1007/978-3-030-04639-2_132",

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editor = "Jackson, {John H. } and Paraventi, {Denise } and Wright, {Michael }",

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Ahonen, M, Lindqvist, S, Sarikka, T, Lydman, J, Mouginot, R, Ehrnstén, U, Nevasmaa, P & Hänninen, H 2019, Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld. in JH Jackson, D Paraventi & M Wright (eds), Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Springer, pp. 1949-1963, 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019, Boston, United States, 18/08/19. https://doi.org/10.1007/978-3-030-04639-2_132

Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld. / Ahonen, Matias (Corresponding author); Lindqvist, Sebastian; Sarikka, Teemu et al.
Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. ed. / John H. Jackson; Denise Paraventi; Michael Wright. Springer, 2019. p. 1949-1963.

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

TY - GEN

T1 - Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld

AU - Ahonen, Matias

AU - Lindqvist, Sebastian

AU - Sarikka, Teemu

AU - Lydman, Jari

AU - Mouginot, Roman

AU - Ehrnstén, Ulla

AU - Nevasmaa, Pekka

AU - Hänninen, Hannu

PY - 2019

Y1 - 2019

N2 - Determination of the fracture toughness properties and thermal aging behavior of dissimilar metal weld (DMW) joints is of utmost importance for successful structural integrity and lifetime analyses. This paper presents results from fracture resistance (J-R), fracture toughness (T 0 ) and Charpy-V impact toughness tests as well as fractography performed for an industrially manufactured narrow-gap DMW mock-up (SA508-Alloy 52-AISI 316L). Tests were performed on post-weld heat treated, 5000 h aged and 10,000 h aged material. The results show that this DMW is tough at the SA 508-Alloy 52 interface, which typically is the weakest zone of a DMW. The DMW joint maintains its high fracture resistance also after thermal aging. Crack propagates for a large part in the carbon-depleted zone (CDZ) of SA 508 but deflects occasionally to the Alloy 52 side due to small weld defects in µm scale. Ductile-to-brittle transition temperature determined from Charpy-V impact toughness tests increases due to thermal aging, but only to a minor extent. No significant change is observed for the T 0 transition temperature due to aging.

AB - Determination of the fracture toughness properties and thermal aging behavior of dissimilar metal weld (DMW) joints is of utmost importance for successful structural integrity and lifetime analyses. This paper presents results from fracture resistance (J-R), fracture toughness (T 0 ) and Charpy-V impact toughness tests as well as fractography performed for an industrially manufactured narrow-gap DMW mock-up (SA508-Alloy 52-AISI 316L). Tests were performed on post-weld heat treated, 5000 h aged and 10,000 h aged material. The results show that this DMW is tough at the SA 508-Alloy 52 interface, which typically is the weakest zone of a DMW. The DMW joint maintains its high fracture resistance also after thermal aging. Crack propagates for a large part in the carbon-depleted zone (CDZ) of SA 508 but deflects occasionally to the Alloy 52 side due to small weld defects in µm scale. Ductile-to-brittle transition temperature determined from Charpy-V impact toughness tests increases due to thermal aging, but only to a minor extent. No significant change is observed for the T 0 transition temperature due to aging.

KW - Aging

KW - Dissimilar metal weld

KW - Microstructural characterization

KW - Ni-base alloy

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DO - 10.1007/978-3-030-04639-2_132

M3 - Conference article in proceedings

AN - SCOPUS:85064066125

SN - 978-3-030-04638-5

SP - 1949

EP - 1963

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

A2 - Jackson, John H.

A2 - Paraventi, Denise

A2 - Wright, Michael

PB - Springer

T2 - 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019

Y2 - 18 August 2019 through 22 August 2019

ER -

Ahonen M, Lindqvist S, Sarikka T, Lydman J, Mouginot R, Ehrnstén U et al. Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld. In Jackson JH, Paraventi D, Wright M, editors, Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Springer. 2019. p. 1949-1963 doi: 10.1007/978-3-030-04639-2_132

Effect of thermal aging on fracture mechanical properties and crack propagation behavior of alloy 52 narrow-gap dissimilar metal weld

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