Abstract
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.
Original language | English |
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Pages (from-to) | 120-127 |
Number of pages | 8 |
Journal | Journal of Materials Science and Technology |
Volume | 153 |
DOIs | |
State | Published - Aug 1 2023 |
Externally published | Yes |
Funding
The authors would like to thank Kim Pestovich of the University of Tennessee for conducting the powder X-ray diffraction measurement. X-ray diffraction experiments were performed at the Joint Institute for Advanced Materials (JIAM) Diffraction Facility located at the University of Tennessee , Knoxville. Peter K. Liaw thanks the support from the National Science Foundation ( DMR-1611180 , 1809640 , and 2226508 ) with the program directors, Drs. J. Madison, Judith Yang, Gary Shiflet, and Diana Farkas. The authors would like to thank Kim Pestovich of the University of Tennessee for conducting the powder X-ray diffraction measurement. X-ray diffraction experiments were performed at the Joint Institute for Advanced Materials (JIAM) Diffraction Facility located at the University of Tennessee, Knoxville. Peter K. Liaw thanks the support from the National Science Foundation (DMR-1611180, 1809640, and 2226508) with the program directors, Drs. J. Madison, Judith Yang, Gary Shiflet, and Diana Farkas.
Keywords
- Ceramic material
- Dislocations
- Mechanical testing
- Numerical algorithms
- Scintillator