SYMPOSIA PAPER Published: 01 January 1985
STP37368S

Evolution of Cavity Microstructure in Ion-Irradiated Type 316 Stainless Steel and Fe-20Ni-15Cr Alloy

Source

The effect of a helium implantation schedule on the evolution of the cavity microstructure in Type 316 stainless steel and Fe-20Ni-15Cr alloy during heavy-ion irradiation was investigated for damage levels up to 100 displacements per atom (dpa) with three helium injection schedules, that is, 15 atomic parts per million (appm) He/dpa, 50 appm He/dpa, and 15 appm He pre-injected prior to Ni+ ion irradiation. In the case of the dual-ion irradiated specimens, there was a trend towards a saturation of the swelling with increasing damage level that was coincident with the saturation and a subsequent decrease of the number density of the small cavities (<8 nm diameter for Type 316 stainless steel and <4 nm for Fe-20Ni-15Cr) and the dislocation density. The bi-modal cavity size distribution that was determined for the Fe-20Ni-15Cr alloy at 40 dpa changed to uni-modal distribution at 65 and 100 dpa.

Author Information

Kohyama, A
University of Tokyo, Tokyo, Japan
Loomis, BA
Materials Science and Technology Division, Argonne National Laboratory, Argonne, IL
Ayrault, G
Materials Science and Technology Division, Argonne National Laboratory, Argonne, IL
Igata, N
University of Tokyo, Tokyo, Japan
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Details
Developed by Committee: E10
Pages: 277–296
DOI: 10.1520/STP37368S
ISBN-EB: 978-0-8031-4935-9
ISBN-13: 978-0-8031-0450-1