Deformation process design for control of microstructure in the presence of dynamic recrystallization and grain growth mechanisms

Ganapathysubramanian, Shankar; Zabaras, Nicholas

doi:10.1016/j.ijsolstr.2003.11.020

Cited by 22 publications

(18 citation statements)

References 19 publications

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“…O segundo elemento tem haver com o fato que esses materiais podem ser projetados para atender demandas específicas através da escolha dos componentes e da orientação geométrica relativa das lâminas (conjunto formado por matriz e fibras), o queé apresentado de forma esquemática na figura 3.2. Situação semelhante desperta interesse na utilização de vários outros materiais levando a uma nova concepção conhecida como "projeto de materiais" [28] e [5], que utiliza de forma sistemática conceitos e técnicas multi-escala.…”

Section: Comportamento Elástico Dos Materiaisunclassified

Modelagem Multiescala em Materiais e Estruturas

2004

Notas Em Matemática Aplicada

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Section: Comportamento Elástico Dos Materiaisunclassified

Modelagem Multiescala em Materiais e Estruturas

2004

Notas Em Matemática Aplicada

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“…is examined in [3,4,7] and the reader is encouraged to consult these references for more details. Parameter sensitivity of a generic field ϒ expressed in a total Lagrangian (TL) framework is briefly described.…”

Section: Polycrystal Plasticitymentioning

confidence: 99%

“…One of the major developments during this period has been the modeling of behavior of crystalline materials using coupled length scale models. Even though most materials are crystalline, many approaches to the design of deformation processes of polycrystal materials assume the material to be isotropic using modeling and control algorithms that are based on phenomenological microstructure evolution constitutive models [4]. However, most process design applications are quite sensitive to the anisotropy of these crystalline materials.…”

Section: Introductionmentioning

confidence: 99%

Multi-length scale design of deformation processes for control of orientation (texture) dependent properties

Ganapathysubramanian¹,

Zabaras²

2004

AIP Conference Proceedings

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Design of deformation (thermo-mechanical) processes to achieve desired structural response will be addressed. Plastic deformation is assumed to be accommodated through crystallographic slip and reorientation of crystals. Conventional methodologies towards polycrystal plasticity use an aggregate of single crystals and this choice of the aggregate affects the response of the polycrystal. In order to address this issue, a continuum approach will be presented for the representation of polycrystals through an orientation distribution function over the orientation space. In addition, conventional polycrystal plasticity models do not consider strain rate and temperature effects on the mechanical response of a crystal. In this effort, a constitutive framework for thermo-elastic-viscoplastic response will be described along with a coupled macro-micro, fully implicit algorithm [1]. Numerical examples that highlight the benefits of the proposed approach will be detailed. Design/control problems, relevant to industry, and involving microstructure sensitive-design of processes will be addressed. A novel, coupled macro-micro continuum sensitivity analysis [2] has been developed for the thermo-mechanical deformation process and is used in a gradient based optimization framework [3]. The design problems are posed as optimization problems with design variables chosen to characterize macro-scale deformation. Through these complex examples, we aim to show that accurate modeling and control of microstructure-sensitive material response is indeed feasible.

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“…The structural changes which occur during the cold deformation of metals include the gradual stretching of the grains in the direction of principal deformation and directional arrangement of the crystallographic lattice [3,4]. The effect of such cold work on the properties of polycrystalline structures have been studied extensively [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The cold work process of wire drawing consists of reducing the cross-section of a wire by pulling the wire through series of conical dies [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of Degree of Cold-Drawing on the Mechanical Properties of Low Carbon Steel

Raji¹,

Oluwole²

2011

MSA

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Low carbon steel metal is used for the manufacture of nails. Steel wire with <0.3% C content is cold-drawn through a series of drawing dies to reduce the diameter of the wire to the required diameter of the nails. A 0.12%w C steel wire cold drawn progressively by 20%, 25%, 40% and 50% was investigated. The influence of the degree of cold drawing on the mechanical properties of the carbon steel material were studied using the tensile test, impact test and hardness test experiments in order to replicate the service condition of the nails. The tensile test was done on a Montanso® tensometer to investigate the yield strength and the tensile strength of the material as the degree of deformation increases. An Izod test was used to determine the impact toughness of the steel using the Hounsfield impact machine and the hardness numbers were obtained for the different degrees of drawn deformation of the steel on the Brinnel tester. The study used the stress-strain relationship of the tensile test experiment to study the effect of the degree of cold-drawing deformation on the yield strength and tensile strength properties of the low carbon steel. The yield strength of the material was observed to reduce with increasing degree of cold-drawing, an indication of reduction in the ductility and the tensile strength of the material reduced with increasing degree of cold-drawn deformation. The ability of the material to resist impact loads when nails are hammered reduced with increasing degree of drawn deformation as a result of strain hardening of the material after the drawing operation. However the resilience of the material to further cold drawn deformation increased with increasing degree of deformation as evident in the Brinnel hardness number which increases with the degree of drawing deformation. This is an indication of the material’s approach to brittleness as the degree of drawn deformation increases

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Deformation process design for control of microstructure in the presence of dynamic recrystallization and grain growth mechanisms

Cited by 22 publications

References 19 publications

Modelagem Multiescala em Materiais e Estruturas

Modelagem Multiescala em Materiais e Estruturas

Multi-length scale design of deformation processes for control of orientation (texture) dependent properties

Influence of Degree of Cold-Drawing on the Mechanical Properties of Low Carbon Steel

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