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Serrated flow in $$\mathrm{NaI:Tl}$$ scintillator crystals

Journal Article · · Journal of Materials Science and Technology
We report the serrated-flow behavior is an important phenomenon that unveils material-deformation mechanisms, as reported for various kinds of materials. NaI doped with Tl (NaI:Tl) is unique among scintillation materials in that the structure contains glide planes that are linked to serration behavior. In the present work, single crystals of NaI:Tl were subjected to room-temperature compression experiments at different strain rates. The serrated flow was observed, and complexity and multifractal analyses were performed to analyze the serration behavior. The findings revealed that the strain rate had a pronounced effect on the complexity and multifractality of the serrated flow, similar to what has been found in other alloy systems. The results also indicate that there may be a strong link between the complexity of the serrated flow behavior and the heterogeneity of the underlying dynamics. It is expected that the present work could be a step toward a better understanding of the deformation behavior and forgeability of NaI:Tl single crystals.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Tennessee, Knoxville, TN (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1961938
Journal Information:
Journal of Materials Science and Technology, Journal Name: Journal of Materials Science and Technology Journal Issue: 1 Vol. 153; ISSN 1005-0302
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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