@inproceedings{59b74c0e810147f29e498e963199af12,
title = "Microstructural characterization of alloy 52 narrow-gap dissimilar metal weld after aging",
abstract = "The safe-end dissimilar metal weld (DMW) joining the reactor pressure vessel to the main coolant piping is one of the most critical DMWs in a nuclear power plant (NPP). DMWs have varying microstructures at a short distance across the ferritic-austenitic fusion boundary (FB) region. This microstructural variation affects the mechanical properties and fracture behavior and may evolve as a result of thermal aging during long-term operation of an NPP. This paper presents microstructural characterization performed for as-manufactured and 5000 h and 10,000 h thermally aged narrow-gap DMW representing a safe-end DMW of a modern pressurized water reactor (PWR) NPP. The most significant result of the study is that the thermal aging leads to a significant decrease in a hardness gradient observed across the ferritic-austenitic FB of the as-manufactured DMW.",
keywords = "Aging, Dissimilar metal weld, Microstructural characterization, Ni-base alloy",
author = "Teemu Sarikka and Roman Mouginot and Matias Ahonen and Sebastian Lindqvist and Ulla Ehrnst{\'e}n and Pekka Nevasmaa and Hannu H{\"a}nninen",
year = "2018",
month = jan,
day = "1",
doi = "10.1007/978-3-319-68454-3_58",
language = "English",
isbn = "978-3-319-68453-6",
volume = "2",
series = "Minerals, Metals and Materials Series",
publisher = "Springer",
number = "Part F11",
pages = "763--777",
editor = "Jackson, {John H.} and Denise Paraventi and Michael Wright",
booktitle = "Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors",
address = "Germany",
note = "18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017, EDM 2017 ; Conference date: 13-08-2017 Through 17-08-2017",
}