AI Article Synopsis
- Radiation-induced detwinning in nanotwinned Cu films is mainly driven by radiation-induced defects, while deformation detwinning is caused by global stress.
- Research using Kr ion irradiation examined how twin thickness affects detwinning mechanisms, focusing on the behavior of two types of incoherent twin boundaries (ITBs): fixed ITBs and free ITBs.
- Detwinning mainly occurs due to the movement of free ITBs, which is influenced by the thickness of the film and the irradiation dose, while fixed ITBs do not migrate.
Article Abstract
The mechanism of radiation-induced detwinning is different from that of deformation detwinning as the former is dominated by supersaturated radiation-induced defects while the latter is usually triggered by global stress. Kr ion irradiation was performed to study the detwinning mechanism of nanotwinned Cu films with various twin thicknesses. Two types of incoherent twin boundaries (ITBs), so-called fixed ITBs and free ITBs, are characterized based on their structural features, and the difference in their migration behavior is investigated. It is observed that detwinning during radiation is attributed to the frequent migration of free ITBs, while the migration of fixed ITBs is absent. Statistics shows that the migration distance of free ITBs is thickness and dose dependent. Potential migration mechanisms are discussed.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5844038 | PMC |
| http://dx.doi.org/10.1080/14686996.2018.1428877 | DOI Listing |
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