A Model of Microstructure Evolution in Metals Exposed to Large Strains

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389561" target="_blank" >RIV/00216208:11320/18:10389561 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.12693/APhysPolA.134.753" target="_blank" >https://doi.org/10.12693/APhysPolA.134.753</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.134.753" target="_blank" >10.12693/APhysPolA.134.753</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A Model of Microstructure Evolution in Metals Exposed to Large Strains

Popis výsledku v původním jazyce

Crystalline materials at yield behave as anisotropic, highly viscous fluids. A microscopic inspection reveals a structural adjustment of the crystal lattice to the material flow carried by dislocations. The resistance to this flow determines the strength of ductile materials. The deformation microstructure evolves within a common framework up to very high strains &gt; 100. To avoid energetically costly multislip, materials are subdivided into regions which deform by fewer slip systems. To maintain compatibility, the regions defined as deformation bands occur in a form of elongated alternately misoriented domains filled with fairly equiaxed dislocation cells. In the proposed continuum mechanics model, the formation of deformation bands of a lamellae type is interpreted as a spontaneous deformation instability caused by an anisotropy of hardening. However, such a model of the bands predicts their extreme orientation and their width tends to zero. This trend is opposed by hardening caused by a bowing stress of dislocations within the cells.

Název v anglickém jazyce

A Model of Microstructure Evolution in Metals Exposed to Large Strains

Popis výsledku anglicky

Crystalline materials at yield behave as anisotropic, highly viscous fluids. A microscopic inspection reveals a structural adjustment of the crystal lattice to the material flow carried by dislocations. The resistance to this flow determines the strength of ductile materials. The deformation microstructure evolves within a common framework up to very high strains &gt; 100. To avoid energetically costly multislip, materials are subdivided into regions which deform by fewer slip systems. To maintain compatibility, the regions defined as deformation bands occur in a form of elongated alternately misoriented domains filled with fairly equiaxed dislocation cells. In the proposed continuum mechanics model, the formation of deformation bands of a lamellae type is interpreted as a spontaneous deformation instability caused by an anisotropy of hardening. However, such a model of the bands predicts their extreme orientation and their width tends to zero. This trend is opposed by hardening caused by a bowing stress of dislocations within the cells.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10102 - Applied mathematics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Acta Physica Polonica A

ISBN

—

ISSN

0587-4246

e-ISSN

neuvedeno

Počet stran výsledku

4

Strana od-do

753-756

Název nakladatele

POLISH ACAD SCIENCES INST PHYSICS

Místo vydání

Warsaw

Místo konání akce

Prague, Czech Republic

Datum konání akce

10. 9. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000453257500032