Journal ArticleDOI
The prospects for superplasticity at high strain rates: Preliminary considerations and an example
Atul H. Chokshi,Marc A. Meyers +1 more
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This article is published in Scripta Metallurgica Et Materialia.The article was published on 1990-04-01. It has received 62 citations till now. The article focuses on the topics: Recrystallization (metallurgy) & Superplasticity.read more
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Dynamic recrystallization in high-strain, high-strain-rate plastic deformation of copper
TL;DR: In this paper, it is proposed that this microstructure develops by dynamic recrystallization, which is enabled by the adiabatic temperature rise, and the grain size-flow stress relationship observed after cessation of plastic deformation is consistent with the general formulation proposed by Derby (Acta metall, mater. 39, 955 (1991)).
Journal ArticleDOI
The effect of grain size on the high-strain, high-strain-rate behavior of copper
TL;DR: In this paper, it was shown that the grain-size dependence of shock response can significantly affect the performance of shaped charges, leading to a prediction of the shock threshold stress for twinning as a function of grain size.
Journal ArticleDOI
Shear Localization in Dynamic Deformation: Microstructural Evolution
TL;DR: In this article, the microstructural aspects of adiabatic shear localization are critically reviewed and a strain-rate-dependent critical strain for the development of shear bands is found.
Journal ArticleDOI
Recrystallization kinetics within adiabatic shear bands
J.A. Hines,Kenneth S. Vecchio +1 more
TL;DR: In this article, a dynamic recrystallization model is proposed in which mechanically-driven subgrain rotations assist the mechanism for recrasing. But the model is not suitable for high strain, high-strain-rate conditions within shear bands.
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Intercalation vortices and related microstructural features in the friction-stir welding of dissimilar metals
TL;DR: The vortex-like structures are composed of dynamically recrystallized, fine-grained intercalation microstructures which have been observed by optical metallography, scanning electron microscopy and transmission electron microscopes as discussed by the authors.
References
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A Model for Boundary Diffusion Controlled Creep in Polycrystalline Materials
TL;DR: In this article, the authors discussed the mechanism of creep in polycrystalline alumina based on the differences between the lattice and boundary diffusion models and showed that the boundary diffusion model is more stable than lattice diffusion model, while the grain size dependence and the numerical constant are greater.
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Overview no. 35 Dynamic recrystallization: Mechanical and microstructural considerations
T. Sakai,John J. Jonas +1 more
TL;DR: In this paper, the role of the strain and strain rate gradients in raising the apparent torsion peak strain ep above the ep values obtained from homogeneous tension or compression testing is clarified.
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Explosives with Lined Cavities
TL;DR: In this article, a mathematical theory of this essentially new phenomenon is presented together with some of the experimental data that aided in the formulation and testing of the theory, which is separated into two phases: first, the formation of part of the metal liner into a long thin jet traveling longitudinally at very high velocities (30,000 ft/sec.) and, second, the forcing aside of the target material by the extremely high pressures (0.3m atmo...
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A model for hot working occurring by recrystallization
Rolf Sandström,Rune Lagneborg +1 more
TL;DR: In this paper, a theoretical model for hot working when dynamical recrystallization occurs is presented, which is based on a description of the volume distributions of dislocations, which are produced as a result of the continuous grain growth.