Prethreshold Effects, when Copper and Its Alloys Were Impacted to Ultraviolet Laser Pulses

The prethreshold processes on the surface of copper and its alloys are investigated. In the absence of obvious traces of melting, while preserving the metal in a condensed state, under a nanosecond ultraviolet laser radiation energy density of 0.1–1.0 J/cm 2 , manifestations of high-temperature plas...

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Bibliographic Details
Published in:Technical physics 2023-12, Vol.68 (Suppl 3), p.S473-S477
Main Authors: Malinskiy, T. V., Rogalin, V. E.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Copper
Copper base alloys
Cracking (fracturing)
Crystallography
Damage accumulation
Grain boundaries
High temperature
Impact damage
Physics
Physics and Astronomy
Plastic deformation
Ultraviolet lasers
Ultraviolet radiation
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Summary:The prethreshold processes on the surface of copper and its alloys are investigated. In the absence of obvious traces of melting, while preserving the metal in a condensed state, under a nanosecond ultraviolet laser radiation energy density of 0.1–1.0 J/cm 2 , manifestations of high-temperature plastic deformation were observed. These are sliding and cracking along grain boundaries, within which crystallographic slipping was observed. A microprotrusion was formed on the surface of the irradiated zone, which was outwardly similar the distribution of laser radiation in the spot. The height of the microprotrusion reached 1 μm, and sometimes even more. An increase in the number of impacting impulses led to the accumulation of damage. The data obtained are in many ways similar to the acoustoplastic, electroplastic, and magnetoplastic effects. By analogy, we consider it possible to call the discovered effect optoplastic.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784223900693