Strength of metals in liquid and solid states at extremely high tension produced by femtosecond laser heating

Journal Article · Mon Jul 30 04:00:00 EDT 2012 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4739866· OSTI ID:22069141

Ashitkov, Sergey I; Inogamov, Nail A; Komarov, Pavel S; Zhakhovsky, Vasily V; Oleynik, Ivan I; Agranat, Mikhail B; Kanel, Gennady I; Fortov, Vladimir E ^[1]

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1. Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 (Russian Federation)

We will discuss results of combined experimental and theoretical investigations of ablation and laser-driven shock-wave phenomena in metal films irradiated by femtosecond laser pulses. The femtosecond interferometric microscopy technique was used to make time-resolved measurements of optical properties as well as record the deformation dynamics at both the rear and frontal surfaces during initial two-temperature electron-ion relaxation and subsequent hydrodynamic expansion. In conjunction with experiment, the formation and propagation of strong tensile and compression waves were investigated by a combination of two-temperature hydrodynamic modeling and molecular dynamics simulations. The experimental tensile strengths of aluminum and nickel in solid and liquid states at extremely high strain rates in range 10{sup 8} Division-Sign 10{sup 9}s{sup -1} were obtained from the time evolution of rear and frontal surface velocities. Theoretical tensile strengths calculated by atomistic simulations of ablation and spallation using micron-sized films agree well with experiment. Elastic-plastic response of metallic films to shock compression investigated by both experiment and theory/modeling will also be discussed.

• OSTI ID: 22069141
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1464; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
ALUMINIUM
COMPRESSION
DEFORMATION
ELECTRON TEMPERATURE
LASER-RADIATION HEATING
LIQUID METALS
MICROSCOPY
MOLECULAR DYNAMICS METHOD
NICKEL
OPTICAL PROPERTIES
PULSED IRRADIATION
RELAXATION
SHOCK WAVES
SOLIDS
STRAIN RATE
TENSILE PROPERTIES
THIN FILMS
TIME RESOLUTION