2002
DOI: 10.1017/s0263034602201123
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Laser-induced tension to measure the ultimate strength of metals related to the equation of state

Abstract: The approach to the ultimate strength of metals is determined experimentally. The strength of the materials and the strain rate were determined from the free surface velocity time history, which was measured with an optically recording velocity interferometer system. The dynamic strength was measured at strain rates in the domain of 5·106 to 5·108 s−1. The necessary tension to break the metal (spall) and the very high strain rates were achieved using high-powered lasers in nanosecond and picosecond reg… Show more

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Cited by 37 publications
(14 citation statements)
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“…It was found that the shear strength of τ = 7.0 GPa measured in the high-purity iron film with thickness of 250 nm approaches the ultimate shear strength of 7.2−7.5 GPa obtained from ab initio calculations [12,13]. Taking into account that elastic waves decay rapidly with increasing sample thickness at a micron scale [2,4], the obtained data show that shear strength of the iron sample with purity of 99.6% is higher than one with purity of 99.99% The spall strength, determined as a tensile stress just before fracture [4,14], was measured from velocity pullback Δu f s shown in Fig. 2.…”
Section: Resultsmentioning
confidence: 71%
“…It was found that the shear strength of τ = 7.0 GPa measured in the high-purity iron film with thickness of 250 nm approaches the ultimate shear strength of 7.2−7.5 GPa obtained from ab initio calculations [12,13]. Taking into account that elastic waves decay rapidly with increasing sample thickness at a micron scale [2,4], the obtained data show that shear strength of the iron sample with purity of 99.6% is higher than one with purity of 99.99% The spall strength, determined as a tensile stress just before fracture [4,14], was measured from velocity pullback Δu f s shown in Fig. 2.…”
Section: Resultsmentioning
confidence: 71%
“…Figure 7. Measured spall strength of aluminum in comparison with the data for different kinds of aluminum [11,12]. The results of the molecular dynamics simulation of spallation [13,14] and the ab initio calculation of the ideal strength [15] are also shown.…”
Section: Results Of Measurementsmentioning
confidence: 99%
“…In case of foils, there is also back-side surface. Spallation at a back-side caused by a laser generated shock, is a more habitual phenomenon [10,[17][18][19][20][21]. We call it simply spallation.…”
Section: Spallative Ablation Of Metals and Semiconductorsmentioning
confidence: 99%