Precipitation and cavity formation in austenitic stainless steels during irradiation

Conference · Thu Jan 01 00:00:00 EST 1981

OSTI ID:6303576

Lee, E H; Rowcliffe, A F; Mansur, L K

Microstructural evolution in austenitic stainless steels subjected to displacement damage at high temperature is strongly influenced by the interactions between helium atoms and second phase particles. Cavity nucleation occurs by the trapping of helium at partially coherent particle-matrix interfaces. The recent precipitate point defect collector theory describes the more rapid growth of precipitate-attached cavities compared to matrix cavities where the precipitate-matrix interface collects point defects to augment the normal point deflect flux to the cavitry. Data are presented which support these ideas. It is shown that during nickel ion irradiation of a titanium-modified stainless steel at 675/sup 0/C the rate of injection of helium has a strong effect on the total swelling and also on the nature and distribution of precipitate phases.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6303576
• Report Number(s): CONF-810831-33; ON: DE81028062; TRN: 81-015225
• Resource Relation: Conference: Fusion reactor materials meeting, Seattle, WA, USA, 9 Aug 1981
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AUSTENITIC STEELS
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
HELIUM
SWELLING
TITANIUM ALLOYS
TRAPPING
ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
FLUIDS
GASES
IRON ALLOYS
IRON BASE ALLOYS
NONMETALS
RADIATION EFFECTS
RARE GASES
STEELS
360106* - Metals & Alloys- Radiation Effects
700209 - Fusion Power Plant Technology- Component Development & Materials Testing