Li Xianfa, An Junyu, Chen Shuisheng, Chen Guoqiang, Liu Yi, Shi Yongjun, Zhou Long
School of Mechanical and Power Engineering, Henan Polytechnic University China
Mechanical and Electrical Engineering Institute, China University of Petroleum China
Nanoscale Adv. 2023 Dec 22;6(3):876-891. doi: 10.1039/d3na00691c. eCollection 2024 Jan 30.
In this research, a molecular dynamics (MD) model was adopted to investigate the essence of the effect of strain rate on the mechanical behavior of the Fe14.6Ni (at%) elastocaloric refrigeration alloy. The study showed that the mechanical behavior of the Fe14.6Ni (at%) alloy was dependent on the strain rate. Besides, the investigation of temperature demonstrated that the strain rate influenced mechanical behavior by changing the transient temperatures. Furthermore, it was found that the adiabatic temperature change (Δ) was high and up to 51 K, which was a 1.57 times improvement. Finally, the conclusion was drawn that the strain rate influenced the mechanical behavior by changing the transient total kinetic energy and the phase content evolution processes, which was the essence of the effect of strain rate on the mechanical behavior. This work has clarified the essence and enriched the theory of the effect of strain rate on the mechanical behavior of elastocaloric refrigeration alloys.
在本研究中，采用分子动力学（MD）模型来探究应变速率对Fe14.6Ni（原子%）弹性制冷合金力学行为影响的本质。研究表明，Fe14.6Ni（原子%）合金的力学行为取决于应变速率。此外，对温度的研究表明，应变速率通过改变瞬态温度来影响力学行为。再者，发现绝热温度变化（Δ）很高，可达51 K，提高了1.57倍。最后得出结论，应变速率通过改变瞬态总动能和相含量演变过程来影响力学行为，这就是应变速率对力学行为影响的本质。这项工作阐明了本质，并丰富了应变速率对弹性制冷合金力学行为影响的理论。
