Abstract
The effect of energy deposition by energetic particles on Ni and two single-phase concentrated solid solution alloys (NiFe and NiCoCrFe) is investigated through combined experimental and modelling efforts. Damage evolution as a function of increasing ion fluence is monitored via elastic strain developed in the irradiated crystals. We show that damage produced from displacement collision cascades is sensitive to subsequent highly ionizing irradiation that the strain generated by elastic nuclear collisions undergoes partial relaxation upon high-energy irradiation. This finding indicates a change in the damage structure upon electronic energy deposition due to both predominant defect annealing and growth of small defect clusters. Strain relaxation, more pronounced in the alloys than in Ni, is ascribed to both higher thermal conductivity and weaker electron-phonon coupling in Ni.
| Original language | English |
|---|---|
| Pages (from-to) | 107-115 |
| Number of pages | 9 |
| Journal | Current Opinion in Solid State and Materials Science |
| Volume | 23 |
| Issue number | 2 |
| DOIs | |
| State | Published - Apr 2019 |
Funding
The work was supported as part of the Energy Dissipation to Defect Evolution (EDDE), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under contract number DE-AC05-00OR22725. The XRD experiments were performed at The Center for Nanophase Materials Science, which is a DOE Office of Science User Facility. Ion beam work was performed at the University of Tennessee–Oak Ridge National Laboratory Ion Beam Materials Laboratory (IBML), located at the campus of the University of Tennessee, Knoxville. Part of the simulation used resources of the National Energy Research Scientific Computing Center, supported by the Office of Science, US Department of Energy, under Contract No. DEAC02-05CH11231. We would like to thank Dr. Zhiqi Liu for his assistance in the XRD measurements and Dr. Ke Jin for his assistance in the ion-irradiation experiments. The work was supported as part of the Energy Dissipation to Defect Evolution (EDDE), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under contract number DE-AC05-00OR22725. The XRD experiments were performed at The Center for Nanophase Materials Science, which is a DOE Office of Science User Facility. Ion beam work was performed at the University of Tennessee?Oak Ridge National Laboratory Ion Beam Materials Laboratory (IBML), located at the campus of the University of Tennessee, Knoxville. Part of the simulation used resources of the National Energy Research Scientific Computing Center, supported by the Office of Science, US Department of Energy, under Contract No. DEAC02-05CH11231. We would like to thank Dr. Zhiqi Liu for his assistance in the XRD measurements and Dr. Ke Jin for his assistance in the ion-irradiation experiments.
| Funders | Funder number |
|---|---|
| DOE Office of Science | |
| IBML | |
| Tennessee?Oak Ridge National Laboratory Ion Beam Materials Laboratory | |
| US Department of Energy | DEAC02-05CH11231 |
| U.S. Department of Energy | |
| Office of Science | |
| Basic Energy Sciences | DE-AC05-00OR22725 |
| University of Tennessee |
Keywords
- Concentrated solid solution alloys
- Defect annihilation
- Elastic strain
- Electronic energy deposition
- Ion irradiation
- Lattice defects
- Molecular dynamics simulation
- X-ray diffraction