A new loop-punching mechanism for helium bubble growth in tungsten
Source abstract
Abstract
Abstract Growth of helium (He) bubbles with different initial sizes in tungsten (W) has been investigated by performing molecular dynamics simulations. Based on the simulation results a new loop punching mechanism for the large helium bubble growth is proposed. Different from the growth of small-size He bubbles by pushing out self-interstitial atoms and then rearranging into a prismatic dislocation loop, a large-size bubble grows by pushing out a dislocation, subsequently cross-slipping of its screw components and finally evolving into a prismatic dislocation loop. Such dislocations may react with each other to form a dislocation net around the bubble rather than to convert to prismatic dislocation loops.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fusion materials and technologies · Quantum, superfluid, helium dynamics · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. The shape of bubbles in He-implanted Cu and Au10.1016/j.scriptamat.2010.04.043 ↗
2. Helium bubble precipitation at dislocation networks10.1016/j.scriptamat.2011.09.027 ↗
3. Grain size effects on He bubbles distribution and evolution10.1016/j.jnucmat.2014.11.036 ↗
4. Radiation-induced helium nanobubbles enhance ductility in submicron-sized single-crystalline copper10.1021/acs.nanolett.6b00864 ↗
5. Effect of tungsten crystallographic orientation on He-ion-induced surface morphology changes10.1016/j.actamat.2013.09.045 ↗
6. Growth of multifractal tungsten nanostructure by He bubble induced directional swelling10.1088/1367-2630/17/4/043038 ↗
7. Nanostructure growth by helium plasma irradiation to tungsten in sputtering regime10.1016/j.jnucmat.2015.01.036 ↗
8. Nanostructured fuzz growth on tungsten under low-energy and high-flux He irradiation
9. Mechanical properties and microstructural change of W–Y2O3 alloy under helium irradiation10.1038/srep12755 ↗
10. Early stage damage of ultrafine-grained tungsten materials exposed to low energy helium ion irradiation10.1016/j.fusengdes.2015.02.001 ↗
11. Systematic investigation of the formation behavior of helium bubbles in tungsten10.1016/j.jnucmat.2014.10.098 ↗
12. Diffusion and transformation kinetics of small helium clusters in bulk tungsten10.1103/PhysRevB.90.014102 ↗
13. Molecular dynamics simulation of helium cluster diffusion and bubble formation in bulk tungsten10.1016/j.jnucmat.2014.08.028 ↗
14. Helium defects interactions and mechanism of helium bubble growth in tungsten: a molecular dynamics simulation10.1016/j.jnucmat.2014.04.022 ↗
15. First-principles investigation of helium dissolution and clustering at a tungsten (110) surface10.1016/j.jnucmat.2015.03.026 ↗
16. Dynamics of small mobile helium clusters near tungsten surfaces10.1016/j.susc.2014.03.020 ↗
17. A molecular dynamics study on bubble growth in tungsten under helium irradiation10.1016/j.jnucmat.2014.12.049 ↗
18. Energetics and kinetics unveiled on helium cluster growth in tungsten10.1088/0029-5515/55/9/092003 ↗
19. Competing kinetics and He bubble morphology in W10.1103/PhysRevLett.114.105502 ↗
20. Atomistic studies of nucleation of He clusters and bubbles in bcc iron10.1016/j.nimb.2012.11.025 ↗
21. Effects of local structure on helium bubble growth in bulk and at grain boundaries of bcc iron: a molecular dynamics study10.1016/j.actamat.2015.06.055 ↗
22. Plastic deformation in nanoindentation of tantalum: a new mechanism for prismatic loop formation10.1016/j.actamat.2014.06.058 ↗
23. Atomistic simulation of tantalum nanoindentation: effects of indenter diameter, penetration velocity, and interatomic potentials on defect mechanisms and evolution10.1016/j.msea.2014.07.001 ↗
24. Comparative simulation study of the structure of the plastic zone produced by nanoindentation10.1016/j.jmps.2014.11.005 ↗
25. Plimpton · 2007
26. Interatomic potentials for simulation of He bubble formation in W10.1016/j.jnucmat.2012.07.023 ↗
27. Visualization and analysis of atomistic simulation data with OVITO–the Open Visualization Tool10.1088/0965-0393/18/1/015012 ↗
28. Systematic analysis of local atomic structure combined with 3D computer graphics10.1016/0927-0256(94)90109-0 ↗
29. Point defect formation by dislocation reactions in TiAl10.1088/1757-899X/3/1/012024 ↗
30. Automated identification and indexing of dislocations in crystal interfaces10.1088/0965-0393/20/8/085007 ↗
31. Formation of dislocation loops during He clustering in bcc Fe10.1088/0953-8984/23/44/442201 ↗
32. Structure of nanoscale gas bubbles in metals10.1063/1.4833775 ↗
33. Hirth · 1982
34. Dislocation dynamics at low temperatures10.1103/PhysRev.115.543 ↗
35. Caillard · 2003
36. Atomistic configurations and energetics of crack extension in silicon10.1103/PhysRevLett.93.205504 ↗
37. Atomistic characterization of three-dimensional lattice trapping barriers to brittle fracture10.1098/rspa.2005.1567 ↗