Journal ArticleDOI
A dislocation-based constitutive model for viscoplastic deformation of fcc metals at very high strain rates
Ryan A. Austin,David L. McDowell +1 more
TLDR
In this article, a physically-based model is developed to address slip in polycrystalline metals and alloys subjected to very high rates of deformation (104−108 s−1).About:
This article is published in International Journal of Plasticity.The article was published on 2011-01-01. It has received 252 citations till now. The article focuses on the topics: Viscoplasticity & Constitutive equation.read more
Citations
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Hydrogen-induced intergranular failure in nickel revisited
May L. Martin,May L. Martin,Brian P. Somerday,Brian P. Somerday,Robert O. Ritchie,Robert O. Ritchie,Petros Athanasios Sofronis,Petros Athanasios Sofronis,Ian M. Robertson,Ian M. Robertson +9 more
TL;DR: Using a combination of high-resolution scanning and transmission electron microscopy, the basic mechanisms of hydrogen-induced intergranular fracture in nickel have been revisited in this paper using focused-ion beam machining.
Journal ArticleDOI
Internal-state-variable based self-consistent constitutive modeling for hot working of two-phase titanium alloys coupling microstructure evolution
Xiaoguang Fan,H. Yang +1 more
TL;DR: In this paper, an internal-state-variable based self-consistent constitutive model was proposed for unified prediction of flow stress and microstructure evolution during hot working of wrought two-phase titanium alloys in both single-beta region and twophase region.
Journal ArticleDOI
Constitutive modelling of plasticity of fcc metals under extremely high strain rates
C.Y. Gao,Liangchi Zhang +1 more
TL;DR: In this paper, a unified constitutive model is proposed to describe the fcc crystalline plasticity at the extreme strain rate beyond which the material sensitivity to strain rate increases dramatically, and an optimization method is used to obtain globally optimal parameters in the model.
Journal ArticleDOI
Cyclic deformation response of AISI 316L at room temperature: Mechanical behaviour, microstructural evolution, physically-based evolutionary constitutive modelling
TL;DR: In this paper, a physically-based evolutionary constitutive model was proposed to accurately represent the complex cyclic deformation response of the material, and the model parameters were identified by a systematic evaluation of mechanical and micro-structural observations from a number of experimental tests.
Journal ArticleDOI
Dislocation based high-rate plasticity model and its application to plate-impact and ultra short electron irradiation simulations
TL;DR: In this article, the authors developed a model to describe high rate deformations of metals, where the over barrier dislocation sliding in specific slip planes is described as the result of an over barrier disassembly.
References
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Book
Theory of Dislocations
John Price Hirth,Jens Lothe +1 more
TL;DR: Dislocations in Isotropic Continua: Effects of Crystal Structure on Dislocations and Dislocation-Point-Defect Interactions at Finite temperatures.
Journal ArticleDOI
Physics and phenomenology of strain hardening: the FCC case
U.F. Kocks,H. Mecking +1 more
Journal ArticleDOI
Kinetics of flow and strain-hardening☆
H. Mecking,U.F. Kocks +1 more
TL;DR: In this paper, a phenomenological model is proposed to incorporate the rate of dynamic recovery into the flow kinetics, which has been successful in matching many experimental data quantitatively, and it has been shown that the proportionality between the flow stress and the square root of the dislocation density holds, to a good approximation, over the entire regime; mild deviations arc primarily attributed to differences between the various experimental techniques used.
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A constitutive description of the deformation of copper based on the use of the mechanical threshold stress as an internal state variable
P.S. Follansbee,U.F. Kocks +1 more