Showing papers by "Marc A. Meyers published in 1980"
TL;DR: In this article, two different types of waves are postulated: longitudinal transformation waves and transverse transformation waves, propagating at velocities of the order of elastic waves, respectively.
17 citations
TL;DR: In this paper, the effects of driver plate thickness and shockloading temperature on the shock wave response of nickel were investigated; driver plates of 3.18, 6.36 and 25.44 mm and temperatures of 77 and 300 K were used at a constant pressure of 15.7 GPa.
11 citations
TL;DR: In this article, a novel experimental set-up for obtaining shock-wave superposition is described, where two opposite sides of an explosive layer placed directly in contact with a steel block are simultaneously initiated at the two opposite side of the explosive layer.
Abstract: A novel experimental set-up for obtaining shock-wave superposition is described. Detonation is simultaneously initiated at the two opposite sides of an explosive layer placed directly in contact with a steel block. It was possible to take advantage of thea (bcc) → e (hcp) →α (bcc) transformation occurring in iron at approximately 13 GPa in a unique fashion. The pressure of the two converging pulses is approximately 13 GPa, resulting in little or no transformation. However, in the region of superposition of the two waves the pressure is much higher.Post explosionem observation of the microstructure allowed an easy identification of the region of superposition, because of the profuse transformation “debris”. Events conducted for three thicknesses of the explosive layers allowed conclusions to be drawn about the changes of rarefaction and attenuation rates. The interactions occurring between the waves due to simultaneous superposition and transformation are thought to be responsible for internal spalling.
5 citations
3 citations