脉冲电流作用下电子风应力模型与计算示例
Electron Wind Stress Model and Calculation Examples under Pulse Current
DOI: 10.12677/CMP.2017.61001, PDF, HTML, XML,  被引量 下载: 1,615  浏览: 4,144  国家自然科学基金支持
作者: 曹富荣*：东北大学材料科学与工程学院，辽宁 沈阳
关键词: 电致塑性；脉冲电流；电子风力；电子风应力；Electro-Plasticity； Pulse Current； Electrion Wind Force； Electron Wind Stress
摘要: 电致塑性是利用电场和脉冲电流改善材料塑性的方法。为了揭示脉冲电流作用下的电子风影响塑性的机理，在Conrad电子风力模型的基础上，提出电子风应力模型。在复杂体系的LAZ922 (Mg-Li-Al-Zn)合金中给出电子风应力计算实例。计算发现，基于位错动力学的电子风应力与实际应力十分吻合，而基于量子力学的电子风应力与实际应力相差很大，造成量子力学方法计算值偏低的原因是没有考虑合金中存在的第二相阻碍电子运动的情况。
Abstract: Electro-plasticity (EP) is an approach to improve the plasticity using electric field and electric pulse current. To disclose the mechanism of EP under the pulse current, a new electron wind stress model was proposed based on Conrad’s electron wind force model. Calculation examples were given in a complex system LAZ922 (Mg-9Li-2Al-2Zn) alloy. It is found through calculation that the electron wind stress based on dislocation kinetics is in good agreement with the practical pulse current stress. However, the electron wind stress based on quantum mechanics is too low and differs greatly from the practical pulse current stress. This is because that the influence of the second phases on the movement of electrons is not considered.
文章引用：曹富荣. 脉冲电流作用下电子风应力模型与计算示例[J]. 凝聚态物理学进展, 2017, 6(1): 1-5. https://doi.org/10.12677/CMP.2017.61001

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