The effect of hydrogen on dislocation motion and cracking in tungsten foil
Source abstract
Abstract
By investigating the change of microstructure features in the presence and absence of hydrogen, we studied the influence of internal hydrogen on the plastic deformation ahead of a crack tip in tungsten foil. After micromechanical loading, ahead of the crack tip in the hydrogen-charged tungsten, we found an intermittent plastic zone composed of dislocation tangles and a dislocation network with an L-square shape. The L -square dislocation structure tended to move along the crack propagation direction. These observations are attributed to the hydrogen effect on the energy release rate and the stress intensity factor. The propagation of crack is considered a result of the competition between H-modified dislocation motion and H-induced decohesion.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Nuclear Materials and Properties · Fusion materials and technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Modified halloysite minerals for radiation shielding purposes
2. Tungsten foil laminate for structural divertor applications–basics and outlook10.1016/j.jnucmat.2012.01.010 ↗
3. Tungsten in north pacific waters10.1016/0304-4203(87)90051-X ↗
4. Basic physical properties and degradability of tungsten wire fibers
5. Hydrogen embrittlement ii. analysis of hydrogen-enhanced decohesion across (111) planes in α-fe
6. Hydrogen-enhanced local plasticity in aluminum: an ab initio study10.1103/PhysRevLett.87.095501 ↗
7. Effects of grain size and deformation temperature on hydrogen-enhanced vacancy formation in ni alloys10.1016/j.actamat.2017.02.016 ↗
8. The effect of hydrogen on the nanoindentation behavior of heat treated 718 alloy10.3390/met10111451 ↗
9. Effect of hydrogen environment on the separation of fe grain boundaries10.1016/j.actamat.2016.01.067 ↗
10. Assessment of the impact of hydrogen on the stress developed ahead of a fatigue crack10.1016/j.actamat.2019.05.028 ↗
11. Influence of hydrogen on dislocation self-organization in ni10.1016/j.actamat.2017.05.073 ↗
12. Hydrogen-modified dislocation structures in a cyclically deformed ferritic-pearlitic low carbon steel10.1016/j.actamat.2017.10.034 ↗
13. Hydrogen embrittlement of tungsten induced by deuterium plasma: Insights from nanoindentation tests10.1557/jmr.2018.305 ↗
14. Hydrogen effect on dislocation nucleation in a vanadium (1 0 0) single crystal as observed during nanoindentation10.1016/j.scriptamat.2010.07.039 ↗
15. Revisiting hydrogen embrittlement models and hydrogen-induced homogeneous nucleation of dislocations10.1016/j.scriptamat.2009.09.037 ↗
16. Determination of hydrogen diffusivity and permeability in w near room temperature applying a tritium tracer technique10.1016/j.jnucmat.2010.12.007 ↗
17. Grain detection from 2d and 3d ebsd data—specification of the mtex algorithm10.1016/j.ultramic.2011.08.002 ↗
18. Inferential statistics of electron backscatter diffraction data from within individual crystalline grains10.1107/S002188981003027X ↗
19. Activation volume and density of mobile dislocations in hydrogen-charged iron10.1016/j.actamat.2013.05.007 ↗
20. G.R. Irwin, Analysis of stresses and strains near the end of a crack traversing a plate.
21. Resolving the geometrically necessary dislocation content by conventional electron backscattering diffraction10.1016/j.scriptamat.2008.01.050 ↗
22. On cracks in rectilinearly anisotropic bodies10.1007/BF00186854 ↗
23. Reducing grain boundary, dislocation line and vacancy formation energies by solute segregation. i. theoretical background10.1016/j.actamat.2007.05.047 ↗
24. Hydrogen embrittlement understood10.1007/s11661-015-2836-1 ↗
25. Hydrogen-enhanced localized plasticity—a mechanism for hydrogen-related fracture10.1016/0921-5093(94)90975-X ↗
26. Enumeration of the hydrogen-enhanced localized plasticity mechanism for hydrogen embrittlement in structural materials10.1016/j.actamat.2018.12.014 ↗
27. Hydrogen-enhanced-plasticity mediated decohesion for hydrogen-induced intergranular and “quasi-cleavage” fracture of lath martensitic steels10.1016/j.jmps.2017.12.016 ↗
28. The effects of hydrogen on the deformation and fracture of β-titanium10.1016/S1359-6454(01)00301-9 ↗
29. Recent developments in the study of hydrogen embrittlement: Hydrogen effect on dislocation nucleation10.1016/j.actamat.2010.05.057 ↗
30. Strain field of interstitial hydrogen atom in body-centered cubic iron and its effect on hydrogen–dislocation interaction10.1016/j.scriptamat.2012.10.026 ↗
31. Hydrogen-induced change in core structures of {110}[111] edge and {110}[111] screw dislocations in iron