3D phase-field modelling of dislocation loop sink strengths
Source abstract
Abstract
Abstract This work presents a 3D phase-field model to correctly evaluate dislocation loop sink strength. This method is applied to a wide range of microstructures (dislocation loops of various types with isotropic or anisotropic elasticity, like in Zr, cohabitation of different types of loop in the same calculation domain), which allows to exhibit several original results. Among them, in the case of isotropic elasticity, our model shows that the sink strength of vacancy loops is higher than that of interstitial ones for low loop radii. In the case of Zr, the effect on sink biases of the shape anisotropy of self-interstitial atoms, already exhibited in the case of straight dislocations, is enhanced for loops and stabilizes basal vacancy and prism-plane interstitial ones. Moreover, isotropic elastic interactions promote the coexistence of parallel vacancy and interstitial loops. This result is still valid in the case of prism-plane loops in Zr, which could provide explanations to several experimental facts.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear Materials and Properties · Fusion materials and technologies · Intermetallics and Advanced Alloy Properties
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References (51)
Show source-provided references
1. The rate theory of swelling due to void growth in irradiated metals10.1016/0022-3115(72)90091-8 ↗
2. Recent advances in the understanding of damage production and its consequences on void swelling, irradiation creep and growth10.1016/S0022-3115(96)00482-5 ↗
3. Golubov · Phil. Mag. A · 2001 · 81 · 253310.1080/01418610108217162 ↗
4. Radiation damage theory
5. Barashev · J. Nucl. Mater. · 2015 · 461 · 8510.1016/j.jnucmat.2015.02.001 ↗
6. Bullough · Proc. R. Soc. A · 1975 · 346 · 81
7. Mansur · 1987
8. Quantitative phase field model for dislocation sink strength calculations10.1016/j.commatsci.2014.02.011 ↗
9. The sink strength of dislocation loops and their growth in irradiated materials10.1016/0022-3115(79)90152-1 ↗
10. Stress-induced diffusion of point defects to spherical sinks10.1063/1.321679 ↗
11. Numerical evaluation of the dislocation loop bias10.1016/j.jnucmat.2004.07.034 ↗
12. Object kinetic monte carlo study of sink strengths10.1016/j.jnucmat.2006.10.002 ↗
13. Sink strength calculations of dislocations and loops using okmc10.1016/j.jnucmat.2013.08.052 ↗
14. Dislocation bias factors in fcc copper derived from atomistic calculations10.1016/j.jnucmat.2013.06.029 ↗
15. Chang · J. Nucl. Mater. · 2015 · 461 · 22110.1016/j.jnucmat.2015.03.025 ↗
16. Kinetic monte-carlo simulation of self-point defect diffusion in dislocation elastic fields in bcc iron and vanadium10.1016/j.jnucmat.2010.12.176 ↗
17. Effect of anisotropy, {SIA} orientation, and one-dimensional migration mechanisms on dislocation bias calculations in metals10.1016/j.jnucmat.2013.02.083 ↗
18. Influence of shape anisotropy of self-interstitials on dislocation sink efficiencies in zr: multiscale modeling10.1103/PhysRevB.90.014104 ↗
19. Numerical evaluation of dislocation loop sink efficiency: a phase-field approach10.1016/j.nimb.2015.01.006 ↗
20. Was · 2007
21. Allnatt · 1993
22. Khachaturyan · 1983
23. Solute segregation and coherent nucleation and growth near a dislocation – a phase-field model integrating defect and phase microstructures10.1016/S1359-6454(00)00331-1 ↗
24. Nanoscale phase field microelasticity theory of dislocations: model and 3d simulations10.1016/S1359-6454(01)00075-1 ↗
25. Phase field methods and dislocations10.1016/S1359-6454(01)00379-2 ↗
26. Nabarro · 1967
27. Free energy of a nonuniform system. i. interfacial free energy10.1063/1.1744102 ↗
28. Woo · 1979
29. The sink strength of a dislocation loop in the effective medium approximation10.1016/0022-3115(81)90154-9 ↗
30. Steady-state diffusion of point defects to dislocation loops10.1016/0375-9601(77)90355-3 ↗
31. The theory of sink strengths
32. Influence of dislocation and dislocation loop biases on microstructures simulated by rate cluster dynamics10.1016/j.jnucmat.2015.09.046 ↗
33. Bastecka · Czech. J. Phys. B · 1964 · 14 · 44310.1007/BF01689477 ↗
34. Rauh · Phys. Sta. Sol. · 1978 · 46 · 49910.1002/pssa.2210460213 ↗
35. Circular edge dislocation loop10.1007/BF02033533 ↗
36. A review of microstructure evolution in zirconium alloys during irradiation10.1016/0022-3115(88)90093-1 ↗
37. Defect accumulation behaviour in hcp metals and alloys10.1016/S0022-3115(99)00172-5 ↗
38. Self-interstitial defects in hexagonal close packed metals revisited: evidence for low-symmetry configurations in ti, zr, and hf10.1103/PhysRevB.87.134108 ↗
39. Self-interstitial configurations in hcp zr: a first principles analysis10.1080/09500839.2012.745653 ↗
40. Dislocation bias in an anisotropic diffusive medium and irradiation growth10.1016/0022-3115(83)90198-8 ↗
41. Theory of irradiation deformation in non-cubic metals: effect of anisotropic diffusion10.1016/0022-3115(88)90096-7 ↗
42. Anisotropy of point defect diffusion in alpha-zirconium10.1007/s11661-002-0144-z ↗
43. Analysis of the anisotropy of point defect diffusion in hcp zr10.1016/j.actamat.2014.06.024 ↗
44. Simmons · 1971
45. The nature of dislocation loops in neutron irradiated zirconium10.1016/0022-3115(77)90113-1 ↗
46. Electron damage in zirconium - i. defect structure and loop character10.1016/0022-3115(83)90322-7 ↗
47. Electron damage in zirconium. ii. nucleation and growth of c-component loops10.1016/0022-3115(83)90323-9 ↗
48. Evolution of microstructure in hcp metals during irradiation10.1016/0022-3115(93)90085-D ↗
49. Similarity and difference between fcc, bcc and hcp metals from the view point of point defect cluster formation10.1016/S0022-3115(99)00167-1 ↗
50. Neutron damage in α-titanium10.1016/0022-3115(83)90196-4 ↗
51. Analysis of the anisotropy of point defect diffusion in hcp zr