SYMPOSIA PAPER Published: 01 January 2000
STP12444S

Cracks in TIG Welded, Neutron-Irradiated 304 Stainless Steel

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In fission and fusion reactor applications, properties of welds and welded joints are key factors that limit component service conditions including their lifetime. Therefore, the availability of reliable repair welding techniques is strongly required in order to reduce the cost of electricity. One of the most difficult and unique characteristics, which repair welding has to overcome, is the radiation damaged microstructure including nuclear transformed gaseous atoms, such as helium from the (n, α) and hydrogen from the (n, p) reaction. There have been many attempts to investigate weldability of heavily neutron-damaged materials for establishing criteria for the repair welding process. The objective of this research is to clarify the mechanisms of weld cracking, especially for heat affected zone cracking in heavily neutron irradiated stainless steels.

Author Information

Kohyama, A
Institute of Advanced Energy, Kyoto University, Kyoto, Japan
Hirose, T
Graduate School of Energy Science, Kyoto University, Kyoto
Suzuki, T
Graduate School of Energy Science, Kyoto University, Kyoto
Narui, M
Institute for Materials Research, Tohoku University, Ibaraki, Japan
Katoh, Y
Institute of Advanced Energy, Kyoto University, Kyoto, Japan
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Details
Developed by Committee: E10
Pages: 959–972
DOI: 10.1520/STP12444S
ISBN-EB: 978-0-8031-5419-3
ISBN-13: 978-0-8031-2852-1