Plastic deformation treated as material flow through adjustable crystal lattice

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F14%3A00228183" target="_blank" >RIV/68407700:21110/14:00228183 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Plastic deformation treated as material flow through adjustable crystal lattice

Popis výsledku v původním jazyce

We analyze a flow of an single crystal compressed in a channel die. After an initial adjustment to a tool, specimens twisted under high axial compression do not change their shape and they withstand unlimited amount of plastic deformation. An initial unsteady material flow is followed by a steady flow where no further work hardening is observed. Looking at other severe plastic deformation experiments, it seems that crystalline materials at yield behave as a special kind of anisotropic, highly viscous fluids. High viscosity provides a possibility to describe the flow as a quasi-static process, where inertial and other body forces can be neglected. The flow through the lattice space is restricted to preferred crystallographic planes and directions causing anisotropy. In the deformation process the lattice is strained and rotated. The formation of the substructure is interpreted as instabilities of the homogeneous material flow. The proposed model is based on the rate form of the decompos

Název v anglickém jazyce

Plastic deformation treated as material flow through adjustable crystal lattice

Popis výsledku anglicky

We analyze a flow of an single crystal compressed in a channel die. After an initial adjustment to a tool, specimens twisted under high axial compression do not change their shape and they withstand unlimited amount of plastic deformation. An initial unsteady material flow is followed by a steady flow where no further work hardening is observed. Looking at other severe plastic deformation experiments, it seems that crystalline materials at yield behave as a special kind of anisotropic, highly viscous fluids. High viscosity provides a possibility to describe the flow as a quasi-static process, where inertial and other body forces can be neglected. The flow through the lattice space is restricted to preferred crystallographic planes and directions causing anisotropy. In the deformation process the lattice is strained and rotated. The formation of the substructure is interpreted as instabilities of the homogeneous material flow. The proposed model is based on the rate form of the decompos

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GAP107%2F12%2F0121" target="_blank" >GAP107/12/0121: Mechanismus tvorby ultra jemné substruktury silnou plastickou deformací</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NANO SPD6 The 6th International Conference on Nanomaterials by Severe Plastic Deformation

ISBN

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ISSN

1757-8981

e-ISSN

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Počet stran výsledku

11

Strana od-do

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Název nakladatele

IOP Institute of Physics

Místo vydání

Bristol BS1 6BE

Místo konání akce

Metz

Datum konání akce

30. 6. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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