Modeling plasticity of materials with nanostructure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10371376" target="_blank" >RIV/00216208:11320/17:10371376 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1757-899X/179/1/012045" target="_blank" >http://dx.doi.org/10.1088/1757-899X/179/1/012045</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/179/1/012045" target="_blank" >10.1088/1757-899X/179/1/012045</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling plasticity of materials with nanostructure

Popis výsledku v původním jazyce

A new approach to modeling of the plasticity of materials with the particle size in the range from 3 to 20 nm (nanostructure) has been proposed. It is based on classical thermodynamic approach employing the surface tension of nanoparticles. Its main advantage is the minimum number of physical parameters in use. In the context of the proposed model, we calculated the dependence of the melting temperature on the nanoparticle size which is consistent with experimental data. The volume density of the surface energy of nanoparticles was also determined. This energy is assumed to be a significant part of the internal energy during deformation Yield point was interpreted as the result of changes of grains surface energy during the deformation. The obtained yield point dependence on the grain size was related to the Hall-Petch law, and this resulted in confirmation of the hypothesis on the crucial role of surface tension forces in the initial stage of plastic deformation of nanomaterials.

Název v anglickém jazyce

Modeling plasticity of materials with nanostructure

Popis výsledku anglicky

A new approach to modeling of the plasticity of materials with the particle size in the range from 3 to 20 nm (nanostructure) has been proposed. It is based on classical thermodynamic approach employing the surface tension of nanoparticles. Its main advantage is the minimum number of physical parameters in use. In the context of the proposed model, we calculated the dependence of the melting temperature on the nanoparticle size which is consistent with experimental data. The volume density of the surface energy of nanoparticles was also determined. This energy is assumed to be a significant part of the internal energy during deformation Yield point was interpreted as the result of changes of grains surface energy during the deformation. The obtained yield point dependence on the grain size was related to the Hall-Petch law, and this resulted in confirmation of the hypothesis on the crucial role of surface tension forces in the initial stage of plastic deformation of nanomaterials.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

4TH INTERNATIONAL CONFERENCE RECENT TRENDS IN STRUCTURAL MATERIALS

ISBN

—

ISSN

1757-8981

e-ISSN

neuvedeno

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

IOP PUBLISHING LTD

Místo vydání

BRISTOL

Místo konání akce

Pilsen

Datum konání akce

9. 11. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000403407100045