铝合金中的位错倍增和动力学

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2022-04-22 DOI:10.1080/09500839.2022.2065701

Tiantian Huang, Fei Liu, Zhiyi Liu, Guangyu He, Yangcheng Hu

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引用次数: 0

摘要

介绍了位错倍增的机理。Al20Cu2Mn3相的表面可以起到阻挡位错运动的屏障作用。当两个具有相反的Burgers向量的位错相互接近时，如果这对位错保持在小于湮灭的临界距离，则位错可以湮灭。在Al20Cu2Mn3相周围形成位错环或位错与位错环相互作用形成位错缠结，促进位错增殖。讨论了位错再生的驱动力、位错滑动速度和位错增殖速率。

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Dislocation multiplication and dynamics in an aluminium alloy

ABSTRACT A mechanism of dislocation multiplication is introduced. The surface of the Al20Cu2Mn3 phase in an Al alloy can act as a barrier to impede dislocation movement. When two dislocations with opposite Burgers vectors approach each other, dislocations can annihilate if the pair remains at a distance less than the critical distance for annihilation. A dislocation loop is then formed around the Al20Cu2Mn3 phase or dislocations interact with the loop forming a dislocation tangle, which can promote dislocation multiplication. The driving force for dislocation reproduction, the dislocation glide velocity and the rate of dislocation multiplication are discussed.

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.