Microstructural, mechanical, and fracture mechanical characterization of SA 508-Alloy 182 dissimilar metal weld in view of mismatch state

Teemu Sarikka (Corresponding Author), Matias Ahonen, Roman Mouginot, Pekka Nevasmaa, Paivi Karjalainen-Roikonen, Ulla Ehrnsten, Hannu Hänninen

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

In dissimilar metal welds (DMWs), the mismatch in material properties between the two joined materials and their abrupt local variation in different narrow zones of the weld are of importance because the local strength mismatch state plays an important role in the fracture behavior. For the experimental determination of the narrow local property variations in DMWs, a weld mock-up consisting of SA 508 pressure vessel steel with AISI 309L/308L cladding and AISI 304 piping steel base metals, an Alloy 182 buttering layer, and Alloy 82 and 182 weld metals was manufactured. In the characterization special attention was paid to the narrow interface zones (NIZ) between SA 508 steel and Alloy 182 buttering. The Alloy 182 buttering and weld metal were found under-matched in strength compared to the SA 508 base metal and the highest strength mismatch existed between the SA 508 heat-affected zone (HAZ) and the Alloy 182 buttering layer. The highest fracture resistance was observed in the Alloy 182 buttering and the fracture resistance of the SA 508 HAZ was similar to that of the fusion boundary. The fracture surfaces consisted of ductile fracture in all investigated samples. The differences in fracture resistance between the different DMW zones were found to relate to the hardness/strength of the particular weld zone as well as to the size and distribution of the MnS-inclusions in the microstructure.
Original languageEnglish
Pages (from-to)13-22
JournalInternational Journal of Pressure Vessels and Piping
Volume145
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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Dissimilar metals
Welds
Metals
Fracture toughness
Steel
Heat affected zone
Ductile fracture
Steel structures
Materials properties
Fusion reactions
Hardness
Microstructure

Keywords

  • dissimilar metal weld
  • strength mismatch
  • fracture resistance
  • crack propagation

Cite this

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title = "Microstructural, mechanical, and fracture mechanical characterization of SA 508-Alloy 182 dissimilar metal weld in view of mismatch state",
abstract = "In dissimilar metal welds (DMWs), the mismatch in material properties between the two joined materials and their abrupt local variation in different narrow zones of the weld are of importance because the local strength mismatch state plays an important role in the fracture behavior. For the experimental determination of the narrow local property variations in DMWs, a weld mock-up consisting of SA 508 pressure vessel steel with AISI 309L/308L cladding and AISI 304 piping steel base metals, an Alloy 182 buttering layer, and Alloy 82 and 182 weld metals was manufactured. In the characterization special attention was paid to the narrow interface zones (NIZ) between SA 508 steel and Alloy 182 buttering. The Alloy 182 buttering and weld metal were found under-matched in strength compared to the SA 508 base metal and the highest strength mismatch existed between the SA 508 heat-affected zone (HAZ) and the Alloy 182 buttering layer. The highest fracture resistance was observed in the Alloy 182 buttering and the fracture resistance of the SA 508 HAZ was similar to that of the fusion boundary. The fracture surfaces consisted of ductile fracture in all investigated samples. The differences in fracture resistance between the different DMW zones were found to relate to the hardness/strength of the particular weld zone as well as to the size and distribution of the MnS-inclusions in the microstructure.",
keywords = "dissimilar metal weld, strength mismatch, fracture resistance, crack propagation",
author = "Teemu Sarikka and Matias Ahonen and Roman Mouginot and Pekka Nevasmaa and Paivi Karjalainen-Roikonen and Ulla Ehrnsten and Hannu H{\"a}nninen",
note = "SDA: SHP: SASUNE Nuclear Project code: 107393",
year = "2016",
doi = "10.1016/j.ijpvp.2016.06.004",
language = "English",
volume = "145",
pages = "13--22",
journal = "International Journal of Pressure Vessels and Piping",
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Microstructural, mechanical, and fracture mechanical characterization of SA 508-Alloy 182 dissimilar metal weld in view of mismatch state. / Sarikka, Teemu (Corresponding Author); Ahonen, Matias; Mouginot, Roman; Nevasmaa, Pekka; Karjalainen-Roikonen, Paivi; Ehrnsten, Ulla; Hänninen, Hannu.

In: International Journal of Pressure Vessels and Piping, Vol. 145, 2016, p. 13-22.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Microstructural, mechanical, and fracture mechanical characterization of SA 508-Alloy 182 dissimilar metal weld in view of mismatch state

AU - Sarikka, Teemu

AU - Ahonen, Matias

AU - Mouginot, Roman

AU - Nevasmaa, Pekka

AU - Karjalainen-Roikonen, Paivi

AU - Ehrnsten, Ulla

AU - Hänninen, Hannu

N1 - SDA: SHP: SASUNE Nuclear Project code: 107393

PY - 2016

Y1 - 2016

N2 - In dissimilar metal welds (DMWs), the mismatch in material properties between the two joined materials and their abrupt local variation in different narrow zones of the weld are of importance because the local strength mismatch state plays an important role in the fracture behavior. For the experimental determination of the narrow local property variations in DMWs, a weld mock-up consisting of SA 508 pressure vessel steel with AISI 309L/308L cladding and AISI 304 piping steel base metals, an Alloy 182 buttering layer, and Alloy 82 and 182 weld metals was manufactured. In the characterization special attention was paid to the narrow interface zones (NIZ) between SA 508 steel and Alloy 182 buttering. The Alloy 182 buttering and weld metal were found under-matched in strength compared to the SA 508 base metal and the highest strength mismatch existed between the SA 508 heat-affected zone (HAZ) and the Alloy 182 buttering layer. The highest fracture resistance was observed in the Alloy 182 buttering and the fracture resistance of the SA 508 HAZ was similar to that of the fusion boundary. The fracture surfaces consisted of ductile fracture in all investigated samples. The differences in fracture resistance between the different DMW zones were found to relate to the hardness/strength of the particular weld zone as well as to the size and distribution of the MnS-inclusions in the microstructure.

AB - In dissimilar metal welds (DMWs), the mismatch in material properties between the two joined materials and their abrupt local variation in different narrow zones of the weld are of importance because the local strength mismatch state plays an important role in the fracture behavior. For the experimental determination of the narrow local property variations in DMWs, a weld mock-up consisting of SA 508 pressure vessel steel with AISI 309L/308L cladding and AISI 304 piping steel base metals, an Alloy 182 buttering layer, and Alloy 82 and 182 weld metals was manufactured. In the characterization special attention was paid to the narrow interface zones (NIZ) between SA 508 steel and Alloy 182 buttering. The Alloy 182 buttering and weld metal were found under-matched in strength compared to the SA 508 base metal and the highest strength mismatch existed between the SA 508 heat-affected zone (HAZ) and the Alloy 182 buttering layer. The highest fracture resistance was observed in the Alloy 182 buttering and the fracture resistance of the SA 508 HAZ was similar to that of the fusion boundary. The fracture surfaces consisted of ductile fracture in all investigated samples. The differences in fracture resistance between the different DMW zones were found to relate to the hardness/strength of the particular weld zone as well as to the size and distribution of the MnS-inclusions in the microstructure.

KW - dissimilar metal weld

KW - strength mismatch

KW - fracture resistance

KW - crack propagation

U2 - 10.1016/j.ijpvp.2016.06.004

DO - 10.1016/j.ijpvp.2016.06.004

M3 - Article

VL - 145

SP - 13

EP - 22

JO - International Journal of Pressure Vessels and Piping

JF - International Journal of Pressure Vessels and Piping

SN - 0308-0161

ER -