Journal ArticleDOI
Crystallographic texture evolution in bulk deformation processing of FCC metals
TLDR
A Taylor-type polycrystalline model, together with a new fully-implicit timeintegration scheme has been developed and implemented in a finite element program to simulate the evolution of crystallographic texture during bulk deformation processing of face centered cubic metals deforming by crystallographic slip as mentioned in this paper.Abstract:
A Taylor-type polycrystalline model, together with a new fully-implicit time-integration scheme has been developed and implemented in a finite element program to simulate the evolution of crystallographic texture during bulk deformation processing of face centered cubic metals deforming by crystallographic slip. The constitutive equations include a new equation for the evolution of slip system deformation resistance which leads to macroscopic strain hardening behavior that is in good accord with experiments performed on OFHC copper. The good predictive capabilities of the constitutive equations and the time-integration procedure for simulating the stress-strain behavior and the evolution of texture under both homogeneous and non-homogeneous deformation conditions are demonstrated by comparing numerical simulations against experimental measurements in simple shear and a simple plane-strain forging experiment on copper.read more
Citations
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Overview of constitutive laws, kinematics, homogenization and multiscale methods in crystal plasticity finite-element modeling: Theory, experiments, applications
TL;DR: In this paper, a review of continuum-based variational formulations for describing the elastic-plastic deformation of anisotropic heterogeneous crystalline matter is presented and compared with experiments.
Journal ArticleDOI
Additively manufactured hierarchical stainless steels with high strength and ductility
Y. Morris Wang,Thomas Voisin,Joseph T. McKeown,Jianchao Ye,Nicholas P. Calta,Zan Li,Zhi Zeng,Yin Zhang,Wen Chen,Tien T. Roehling,Ryan T. Ott,Melissa K. Santala,Philip J. Depond,Manyalibo J. Matthews,Alex V. Hamza,Ting Zhu +15 more
TL;DR: The potential of additive manufacturing to create alloys with unique microstructures and high performance for structural applications is demonstrated, with austenitic 316L stainless steels additively manufactured via a laser powder-bed-fusion technique exhibiting a combination of yield strength and tensile ductility that surpasses that of conventional 316L steels.
Journal ArticleDOI
A general anisotropic yield criterion using bounds and a transformation weighting tensor
A.P. Karafillis,Mary C. Boyce +1 more
TL;DR: In this paper, a gspeneral expression for the yield surface of polycrystalline materials is developed, which can describe both isotropic and anisotropic materials.
Journal ArticleDOI
Computational homogenization analysis in finite plasticity Simulation of texture development in polycrystalline materials
TL;DR: In this paper, the deformation of a micro-structure is coupled with the local deformation at a typical material point of the macro-continuum by three alternative constraints of the microscopic fluctuation field.
Journal ArticleDOI
Deformation twinning in AZ31: Influence on strain hardening and texture evolution
Marko Knezevic,Amanda Levinson,Ryan Harris,Raja K. Mishra,Roger D. Doherty,Surya R. Kalidindi +5 more
TL;DR: In this paper, the authors investigated the effects of deformation twinning on various aspects of plastic deformation, including the anisotropic strain-hardening rates, the tension/compression yield asymmetry, and the evolution of crystallographic texture.
References
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Journal ArticleDOI
Methods in Computational Physics
Journal ArticleDOI
Inelastic constitutive relations for solids: An internal-variable theory and its application to metal plasticity
TL;DR: In this article, the theoretical foundations of constitutive relations at finite strain for a class of solids exhibiting inelasticity as a consequence of specific structural rearrangements, on the microscale, of constituent elements of material.
Journal ArticleDOI
Overview no. 42 Texture development and strain hardening in rate dependent polycrystals
R.J. Asaro,Alan Needleman +1 more
TL;DR: In this article, a rate dependent constitutive model is developed for polycrystals subjected to arbitrarily large strains, and the model is used to predict deformation textures and large-strain strain hardening behavior following various stressstrain histories for single phase f.c. aggregates that deform by crystallographic slip.
Journal ArticleDOI
A general theory of uniqueness and stability in elastic-plastic solids
TL;DR: A sufficient condition for uniqueness of the boundary-value problem set by given velocities on a part of the surface of a body and given nominal traction-rates on the remainder is established in this paper.
Journal ArticleDOI
Material rate dependence and localized deformation in crystalline solids
TL;DR: In this paper, a planar double slip model was proposed to analyze the effect of material rate sensitivity on the formation of conjugate slip bands in planar planar crystal geometries.
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Overview no. 42 Texture development and strain hardening in rate dependent polycrystals
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