Comparison of void strengthening in fcc and bcc metals : large-scale atomic-level modelling.

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Materials Science and Engineering A

DOI:https://doi.org/10.1016/j.msea.2005.02.083· OSTI ID:1003354

Osetskiy, Yury N ^[1]; Bacon, David J ^[2]

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1. ORNL
2. University of Liverpool

Strengthening due to voids can be a significant radiation effect in metals. Treatment of this by elasticity theory of dislocations is difficult when atomic structure of the obstacle and dislocation is influential. In this paper, we report results of large-scale atomic-level modelling of edge dislocation-void interaction in fcc (copper) and bcc (iron) metals. Voids of up to 5 nm diameter were studied over the temperature range from 0 to 600 K. We demonstrate that atomistic modelling is able to reveal important effects, which are beyond the continuum approach. Some arise from features of the dislocation core and crystal structure, others involve dislocation climb and temperature effects.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003354
• Journal Information: Materials Science and Engineering A, Journal Name: Materials Science and Engineering A Vol. 400-401; ISSN 0921-5093
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
CRYSTAL STRUCTURE
DISLOCATIONS
ELASTICITY
IRON
RADIATION EFFECTS
TEMPERATURE DEPENDENCE