Effect of Microstructure on Mechanical Behavior of Ni-base Alloy Dissimilar Metal Welds

Noora Hytönen, Yanling Ge, Zaiqing Que, Sebastian Lindqvist, Jari Lydman, Ulla Ehrnstén, Paavo Rautala, Iikka Virkkunen, Pål Efsing

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Two dissimilar metal weld (DMW) mock-ups, representative of actual nuclear components, are investigated in this work: a Ringhals Alloy 52 DMW mock-up consisting of two Alloy 52 butterings and a TVO Alloy 52 narrow-gap DMW mock-up without buttering. In this study, the microstructure characterization, the micro- and nanohardness measurements and the carbide analysis across the SA508/nickel-base Alloy 52 fusion boundary of these two mock-ups were performed. Different width of carbon-depleted zone and slightly different carbide types in the low-allow steel (LAS) heat-affected zone were found in these two DMWs. The local hardness mismatch and fusion boundary transition zones at the LAS/nickel-base weld metal interface were analyzed for these two mock-ups.
Original languageEnglish
Title of host publicationThe 20th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactor meeting
PublisherAmerican Nuclear Society (ANS)
Publication statusAccepted/In press - 2022
MoE publication typeA4 Article in a conference publication
Event20th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactor - Snowmass, United States
Duration: 17 Jul 202221 Jul 2022

Conference

Conference20th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactor
Country/TerritoryUnited States
CitySnowmass
Period17/07/2221/07/22

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