Detwinning through migration of twin boundaries in nanotwinned Cu films under in situ ion irradiation
- Peking Univ., Beijing (People's Republic of China)
- China Univ. of Petroleum, Beijing (People's Republic of China)
- Xi’an Jiaotong Univ. Xi’an (People's Republic of China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
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. Here, potential migration mechanisms are discussed.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Ministry of Science and Technology of the People's Republic of China; National Natural Science Foundation of China (NSFC); China University of Petroleum; USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1483413
- Journal Information:
- Science and Technology of Advanced Materials, Vol. 19, Issue 1; ISSN 1468-6996
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Recent Studies on the Microstructural Response of Nanotwinned Metals to In Situ Heavy Ion Irradiation
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journal | November 2019 |
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