SYMPOSIA PAPER Published: 01 January 1987
STP33812S

Void Swelling and Microstructural Change in Neutron Irradiated Type 316 Stainless Steel

Source

Microstructural observations were made on cold-worked Type 316 stainless steel following fast neutron irradiation to a peak neutron fluence of 1.3 × 1027 n/m2 (E > 0.1 MeV) at temperatures from 400 to 620°C. The results show that nickel depletion in the matrix after neutron irradiation is related to the formation of phosphides and void swelling. Phosphorus in solution retards not only the recovery of dislocations but also the development of nickel- and silicon-rich phases, and this results in suppressing nickel depletion in the matrix and an extension of the transient regime in void swelling. Phosphides are formed during the transient regime at temperatures from 490 to 570°C. After phosphides are formed, retardation effects on both dislocation recovery and the formation of nickel- and silicon-rich phases are lost, and this leads to the onset of void swelling.

Author Information

Itoh, M
Power Reactor and Nuclear Fuel Development Corporation, Oarai, Ibaraki, Japan
Onose, S
Power Reactor and Nuclear Fuel Development Corporation, Oarai, Ibaraki, Japan
Yuhara, S
Power Reactor and Nuclear Fuel Development Corporation, Oarai, Ibaraki, Japan
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Details
Developed by Committee: E10
Pages: 114–126
DOI: 10.1520/STP33812S
ISBN-EB: 978-0-8031-5016-4
ISBN-13: 978-0-8031-0962-9