The effect of temperature on defect production by displacement cascades in {alpha}-iron

Book · Sat Nov 01 00:00:00 EST 1997

OSTI ID:541129

Gao, F; Bacon, D J ^[1]; Flewitt, P E.J.; Lewis, T A ^[2]

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1. Univ. of Liverpool (United Kingdom). Dept. of Materials Science and Engineering
2. Magnox Electric PLC, Berkeley (United Kingdom). Technology and Central Engineering Div.

Molecular dynamics (MD) simulations have been used to study the number and arrangement of defects produced by displacement cascades as functions of irradiation temperature, T{sub irr}, in {alpha}-iron. The continuum treatment of heat conduction was used to adjust the temperature of the MD boundary atoms throughout the cascade process. This new hybrid model has been applied to cascades of either 2 or 5 keV at 100K, 400K, 600K and 900K. The number of Frenkel pairs decreases by about 20--30% as T{sub irr} increases from 100K to 900K, due to the increase in the lifetime of the thermal-spike phase. The same effect also brings about an increase in the proportion of self-interstitial atoms that form clusters.

• OSTI ID: 541129
• Report Number(s): CONF-961202-; ISBN 1-55899-343-6; TRN: 97:019634
• Resource Relation: Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of Microstructure evolution during irradiation; Robertson, I.M. [ed.] [Univ. of Illinois, Urbana, IL (United States)]; Was, G.S. [ed.] [Univ. of Michigan, Ann Arbor, MI (United States)]; Hobbs, L.W. [ed.] [Massachusetts Inst. of Tech., Cambridge, MA (United States)]; Diaz de la Rubia, T. [ed.] [Lawrence Livermore National Lab., CA (United States)]; PB: 752 p.; Materials Research Society symposium proceedings, Volume 439
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC DISPLACEMENTS
IRON-ALPHA
MOLECULAR DYNAMICS METHOD
CRYSTAL DEFECTS
TEMPERATURE DEPENDENCE
THEORETICAL DATA