Evolution of cavity microstructure in ion-irradiated 316 SS and Fe-20Ni-15Cr alloy. [Fe-20Ni-15Cr]

Conference · Sun Apr 01 00:00:00 EST 1984

OSTI ID:6880673

Kohyama, A; Loomis, B; Ayrault, G; Igata, N

The effect of helium implantation schedule on the evolution of the cavity microstructure in 316 SS and Fe-20Ni-15Cr alloy during heavy-ion irradiation was investigated for damage levels up to 100 dpa with three helium injection schedules, i.e., 15 appm He/dpa, 50 appm He/dpa and 15 appm He preinjected prior to Ni/sup +/ 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 closely related to the saturation and subsequent decrease of the number density of the small cavities (<8 nm diameter for 316 SS and <4 nm for Fe-20Ni-15Cr) and the dislocation density. The bi-model 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. Radiation-induced segregation was high and this was related to the saturation tendency for the swelling.

• Research Organization: Tokyo Univ. (Japan); Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6880673
• Report Number(s): CONF-840604-6; ON: DE84012111
• Resource Relation: Conference: 12. international symposium on effects of radiation on materials, Williamsburg, VA, USA, 18 Jun 1984
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
PHYSICAL RADIATION EFFECTS
IRON BASE ALLOYS
NICKEL ALLOYS
STAINLESS STEEL-316
CAVITATION
HEAVY IONS
HELIUM
ION BEAMS
SEGREGATION
SWELLING
ALLOYS
BEAMS
CHARGED PARTICLES
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ELEMENTS
FLUIDS
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IONS
IRON ALLOYS
MATERIALS
MOLYBDENUM ALLOYS
NONMETALS
RADIATION EFFECTS
RARE GASES
STAINLESS STEELS
STEELS
360106* - Metals &amp; Alloys- Radiation Effects