Direct observation of deformation and resistance to damage accumulation during shock loading of stabilized nanocrystalline Cu-Ta alloys

被引：0

作者：

B. C. Hornbuckle ^{[1
]}

R. K. Koju ^{[2
]}

G. Kennedy ^{[3
]}

P. Jannotti ^{[1
]}

N. Lorenzo ^{[1
]}

J. T. Lloyd ^{[1
]}

A. Giri ^{[1
]}

K. Solanki ^{[4
]}

N. N. Thadhani ^{[3
]}

Y. Mishin ^{[2
]}

K. A. Darling ^{[1
]}

机构：

[1] DEVCOM Army Research Laboratory,Army Research Directorate

[2] MSN 3F3,Department of Physics and Astronomy, George Mason University

[3] 771 Ferst Dr. NW,School of Materials Science and Engineering, Georgia Institute of Technology

[4] Arizona State University,School for the Engineering of Matter, Transport, and Energy

来源：

Nature Communications | / 15卷 / 1期

关键词：

D O I：

10.1038/s41467-024-53142-3

中图分类号：

学科分类号：

摘要：

Energy absorption by matter is fundamental to natural and man-made processes. However, despite this ubiquity, developing materials capable of withstanding severe energy fluxes without degradation is a significant challenge in materials science and engineering. Despite recent advances in creating alloys resistant to energy fluxes, mitigating the damage caused by the absorption and transfer of mechanical energy remains a critical obstacle in both fundamental science and technological applications. This challenge is especially prominent when the mechanical energy is transferred to the material by shock loading. This study demonstrates a phenomenon in which microstructurally stabilized nanocrystalline Cu-Ta alloys can undergo reversal or nearly complete recovery of the dislocation structure after multiple shock-loading impacts, unlike any other known metallic material. The microstructure of these alloys can withstand repeated shock-wave interactions at pressures up to 12 GPa without any significant microstructural damage or deterioration, demonstrating an extraordinary capacity to be virtually immune to the detrimental effects of shock loading.

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