Temperature Effects on He bubbles production due to cascades in alpha-iron

Journal Article · Sat Jul 15 04:00:00 EDT 2006 · Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing, 427(1-2):343-347

DOI:https://doi.org/10.1016/j.msea.2006.04.086· OSTI ID:893663

Yang, Li; Zu, Xiaotao; Xiao, H Y; Gao, Fei; Liu, K Z; Heinisch, Howard L; Kurtz, Richard J; Yang, S Z

The effects of irradiation temperature on the formation of He?vacancy clusters by displacement cascades in *-Fe are investigated by molecular dynamics (MD) methods. The irradiation temperatures of 100 and 600K are considered for primary knock-on atom (PKA) energy, Ep, from 500 eV to 20 keV. The concentration of He in Fe varies from 1 to 5 at.%. We find that the number of Frenkel pairs (NF) at 600K is slightly lower than that at 100K for the same He concentration and Ep, but the number of He?vacancy clusters increases with increasing temperature for the same He concentration and energy recoils. However, the mean size of He?vacancy clusters is independent on temperature. The mechanisms of He bubble nucleation in displacement cascades at different temperatures are discussed in detail.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 893663
• Report Number(s): PNNL-SA-51217
• Journal Information: Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing, 427(1-2):343-347, Journal Name: Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing, 427(1-2):343-347
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC DISPLACEMENTS
BUBBLES
HELIUM
IRON
IRRADIATION
KNOCK-ON
MOLECULAR DYNAMICS METHOD
NUCLEATION
PRODUCTION
TEMPERATURE DEPENDENCE