Effect of elastic fields of dislocations on the equilibrium configurations of self-interstitial atoms in cubic crystals. Part I. BCC iron crystal
Self-interstitial atoms (SIA) are one of the main types of radiation-induced point defects in materials. Using the methods of anisotropic theory of elasticity, we determine the energy of the interaction of dislocations of different types with elastic dipoles of different symmetry that are produced by SIAs in the bcc iron crystals. The authors find the values of the intrinsic deformations of SIAs in different configurations that are necessary for the calculations. The results enable us to identify the distinctive features of the motion of dislocations and SIAs during interaction in bcc and fcc crystals, to assess the behavior of such crystals under irradiation, and to characterize the properties of ferritic and austenitic structural materials used in fast reactors. The coupling energy between the screw dislocation and the crowdion configuration of the self-interstitial atom considerably exceeds the energy of formation of a double kink of the screw dislocation, which ensures activationless slip of screw dislocations because of the interaction with SIAs and, consequently, the radiation softening of bcc iron crystal in the range of sufficiently low temperatures.
- OSTI ID:
- 5357553
- Journal Information:
- Sov. At. Energy (Engl. Transl.); (United States), Vol. 61:6; Other Information: Translated from At. Ehnerg.; 61: No. 6, 422-428(Dec 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
ATOMS
DIFFUSION
IRON
BCC LATTICES
EDGE DISLOCATIONS
ELASTICITY
INTERSTITIALS
PHYSICAL RADIATION EFFECTS
SCREW DISLOCATIONS
BINDING ENERGY
EQUILIBRIUM
IRRADIATION
MATERIALS TESTING
REACTOR MATERIALS
STABILIZATION
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DISLOCATIONS
ELEMENTS
ENERGY
LINE DEFECTS
MATERIALS
MECHANICAL PROPERTIES
METALS
POINT DEFECTS
RADIATION EFFECTS
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENTS
360106* - Metals & Alloys- Radiation Effects
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties
220200 - Nuclear Reactor Technology- Components & Accessories