Crystal plasticity finite element simulation of lattice rotation and x-ray diffraction during laser shock compression of tantalum
Crystal plasticity finite element simulation of lattice rotation and x-ray diffraction during laser shock compression of tantalum
复制标题
钽激光冲击压缩过程中晶格旋转和 X 射线衍射的晶体塑性有限元模拟
DOI:
10.1103/physrevmaterials.7.113608
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发表时间:
2023
影响因子:
3.4
通讯作者:
Avraam P
中科院分区:
文献类型:
--
作者:
Avraam P
We present a crystal plasticity model tailored for high-pressure, high-strain-rate conditions that uses a multiscale treatment of dislocation-based slip kinetics. We use this model to analyze the pronounced plasticity-induced lattice rotations observed in shock-compressed polycrystalline tantalum viain situx-ray diffraction. By making direct comparisons between experimentally measured and simulated texture evolution, we can explain how the details of the underlying slip kinetics control the degree of lattice rotation that ensues. Specifically, we show that only the highly nonlinear kinetics caused by dislocationnucleationcan explain the magnitude of the rotation observed under shock compression. We demonstrate a good fit between our crystal plasticity model and x-ray diffraction data and exploit the data to quantify the dislocation nucleation rates that are otherwise poorly constrained by experiment in the dynamic compression regime.
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