Showing papers by "Marc A. Meyers published in 1977"
TL;DR: In this paper, a model for the rise times of elastic waves in polycrystalline metals is developed, which incorporates the following parameters: anisotropy of wave velocity, scattering by grain boundaries, mode conversion and deflection due to anisotropic of adjacent grains, dislocation effects, and intrinsic wave rise time.
41 citations
TL;DR: In this article, it was shown that nickel shock loaded to a pressure of 20 GN/m2 (200 Kbar) and pulse durations of 1.2, 2.4 and 10.1 μ.
Abstract: It is shown that nickel shock loaded to a pressure of 20 GN/m2 (200 Kbar) and pulse durations of 1.2, 2.4 and 10.1 μ.sec exhibits work softening upon subsequent uniaxial tensile deformation at ambient temperature and nominal strain rate of 10 sec. When the tensile deformation on the preshocked sample is conducted at 77 K, work softening is inhibited. It is proposed, in accordance with the findings of Longo and Reed-Hill (Metallography, vol. 7, p. 181, 1974) that work softening is due to dynamic recovery that during conventional deformation replaces the shock-loading substructure (small cells, with illdefined walls) by the substructure characteristic of the conventional deformation at the imposed conditions. Since the quasi-static deformation substructure at 77 K is quite similar to the shock-induced one, work softening is inhibited at that temperature.
17 citations
6 citations
4 citations
TL;DR: In this paper, a study of fracture development in Fe-31%Ni-0.1%C alloy has been made, where samples of this alloy, which show deformation-induced martensite transformation, were given pretreatments of shock loading and grain refining.
2 citations