DFXM characterisation of dislocation avalanches with concurrent acoustic emission measurements

ESRF Portal2028-01-01 更新2026-04-23 收录

位错动力学表征

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https://doi.esrf.fr/10.15151/ESRF-ES-2019958061 数据链接链接失效反馈

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资源简介：

During plastic deformation the motion of dislocations is intermittent giving rise to random sudden localised strain bursts, called dislocation avalanches. The aim of the proposal is to understand how and where such dislocation avalanches are triggered and to develop novel methodologies to monitor them. To this end, we propose a Dark-field X-ray microscopy (DFXM) experiment to characterise in situ the spatial structure of these avalanches and their fluctuation during micropillar compression. The experiment will be coupled with acoustic emission (AE) measurements in order to establish a quantitative relationship between dislocation avalanches and the emitted AE signals. The results are expected to shed light on the fundamentals of dislocation patterning and by deciphering the meaning of AE signals, they will have the potential to enhance the durability of engineering materials.

提供机构：

Ecole Nationale Superieure des Mines, Centre Science des Matériaux et Structures, 158 cours Fauriel, 42023 , Saint-etienne, FR; Mines St. Etienne, Laboratoire Georges Friedel, 158 Cours Fauriel, Saint-étienne, 42023 Saint-etienne, France; Eotvos L University, Department of Materials Physics, Institute of Physics P O Box 32, 1518, Budapest, HU; Eotvos Lorand University, Department of Materials Science, Egyetem tér 1-3 Budapest, 1053, Budapest, HU; Eotvos L University, Department of Materials Physics, Institute of Physics, P O Box 32, 1518 Budapest, Hungary; Ecole Nationale Superieure des Mines, Centre Science des Matériaux et Structures, 158 cours Fauriel, 42023 Saint-etienne Cedex 02, France

创建时间：

2028-01-01