Journal
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
Volume 19, Issue 1, Pages 212-220Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14686996.2018.1428877
Keywords
In situ; ion irradiation; nanotwins; detwinning
Categories
Funding
- Ministry of Science and Technology of China [2015GB121004]
- National Natural Science Foundation of China [11375018, 11528508, 51231008, 51320105014, 51321003, 51501225, 61377056]
- China University of Petroleum, Beijing [2462015YQ0602]
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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. In situ 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. [GRAPHICS] .
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