Matter and Radiation at Extremes, Volume. 9, Issue 2, 027802(2024)
On the thermodynamics of plasticity during quasi-isentropic compression of metallic glass
Fig. 1. (a) Illustrations of three different compression simulations: pISE, UC-QIC, and NEMD-QIC. (b) and (c) Thermodynamic paths undergone by Cu50Zr50 metallic glass subjected to pISE, UC-QIC, and NEMD-QIC at an equivalent strain rate of
Fig. 2. Illustration of the reference isentrope, instant isentrope, and quasi-isentrope without phase transition. States
Fig. 3. Illustration of the framework integrating thermodynamics, mechanics, and microstructural analysis.
Fig. 4. (a) Shear modulus mapped into pressure and density. (b) Grüneisen parameter vs density at 300, 400, 500, and 600 K. (c) Vibrational entropy mapped into pressure and density. (d) Isochoric heat capacity vs nonaffine atomic strain at different densities and temperatures.
Fig. 5. (a) Isentrope recovered from
Fig. 6. (a) Excess temperature Δ
Fig. 7. (a) Total entropy increase Δ
Fig. 8. (a) Local fivefold symmetry (LFFS) vs relative density under compression. (b) Shannon entropy defined on a copper-centered polyhedron distribution vs relative density. Only compressions in the rate-insensitive regime are shown.
Fig. 9. (a) Configurational entropy vs Shannon entropy defined on copper-centered polyhedron distribution. (b) Taylor–Quinney factor (TQF) vs configurational entropy change during plastic regime for NEMD-QIC. Only compressions in the rate-insensitive regime are shown. Black solid lines are fitting curves.
Fig. 10. (a) Configurational energy vs plastic strain. (b) Effective temperature and temperature vs plastic strain. Only compressions in the rate-insensitive regime are shown.
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Kaiguo Chen, Bo Chen, Yinan Cui, Yuying Yu, Jidong Yu, Huayun Geng, Dongdong Kang, Jianhua Wu, Yao Shen, Jiayu Dai. On the thermodynamics of plasticity during quasi-isentropic compression of metallic glass[J]. Matter and Radiation at Extremes, 2024, 9(2): 027802
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Received: Sep. 11, 2023
Accepted: Jan. 10, 2024
Published Online: Apr. 15, 2024
The Author Email: Chen Kaiguo (chenkaiguo@nudt.edu.cn)