Abstract
Crystallographic models of TiZrVMo HEAs were established here for six distinct grain sizes ranging from 7.4 to 23.5 nm. A consistent rise in tensile stress maxima is observed with diminishing grain size. Remarkably, the TiZrVMo composition demonstrates its optimal performance at a grain size of 12.4 nm. During tensile processes, TiZrVMo displays pronounced atomic plane slip and an increase in intra-grain dislocations, indicating significant plastic deformation. Conversely, TiZrV3Mo exhibits limited slip and localized stress, signifying a lower degree of plasticity. This research unveils the intricate interplay of grain boundary phenomena, dislocation behavior, and atomic plane slip, thereby shedding light on the mechanical properties of HEAs.
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Acknowledgements
The authors would like to acknowledge the financial support of National Natural Science Foundation of China (No. 51875541), Key Research and Development Projects of Shaanxi (No. 2023-YBGY-467) and Xi'an Advanced Manufacturing Technology Project (21XJZZ0048).
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LC Zhuo conceived the idea, led the methodology, investigation, organization, and supervised the work, also responsible for writing the original draft, reviewing and editing the manuscript, and acquiring funding. JC Sun and BQ Chen contributed to writing, reviewing, and editing the manuscript. MR Zhan and CH Jiang participated in the manuscript's review and editing process.
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Sun, J., Zhuo, L., Chen, B. et al. Tensile behavior and microstructural evolution of TiMoZrV HEAs: a molecular dynamics study. Appl. Phys. A 130, 95 (2024). https://doi.org/10.1007/s00339-023-07255-z
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DOI: https://doi.org/10.1007/s00339-023-07255-z