Kinetics of Grain Boundary Networks Controlled by Triple Junction and Grain Boundary Mobility

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00497450" target="_blank" >RIV/68081723:_____/18:00497450 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3390/met8120977" target="_blank" >http://dx.doi.org/10.3390/met8120977</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met8120977" target="_blank" >10.3390/met8120977</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Kinetics of Grain Boundary Networks Controlled by Triple Junction and Grain Boundary Mobility

Popis výsledku v původním jazyce

The kinetics of a triple junction of grain boundarieswith distinct specific energies andmobilities and a finite mobility of the triple junction is investigated. The microstructure is approximated byndifferent 2D settings consisting of typical structural elements. First, the migration of the triple point together with the adjacent grain boundaries, is simulated, assuming that the grains are infinitely large. Secondly, by altering the boundary conditions’ growth and shrinkage, finite n-sided grains are simulated and compared to the already published analytical solution. The numerical results coincide with the corrected analytical solution. This solution can be derived either by applying the principle of maximum dissipation, or by applying the force balance at the triple junction within the framework of linear irreversible thermodynamics. The change of the area of infinite and finite grains is investigated analytically and numerically. By comparing the results of both approaches, the influence of the initial topology of the structural elements on the kinetics of grain growth can be estimated. Furthermore, the kinetics of grain growth of different idealized grain boundary networks is investigated. It is shown that square shaped grains surrounded by hexagons and dodecagons result in a more realistic grain growth scenarios than squares surrounded by octagons. A deviation from idealized grain boundary arrangements is e.g., observed, due to different triple junction mobilities, and the initially n-sided regular grain deforms in a complex manner.

Název v anglickém jazyce

Kinetics of Grain Boundary Networks Controlled by Triple Junction and Grain Boundary Mobility

Popis výsledku anglicky

The kinetics of a triple junction of grain boundarieswith distinct specific energies andmobilities and a finite mobility of the triple junction is investigated. The microstructure is approximated byndifferent 2D settings consisting of typical structural elements. First, the migration of the triple point together with the adjacent grain boundaries, is simulated, assuming that the grains are infinitely large. Secondly, by altering the boundary conditions’ growth and shrinkage, finite n-sided grains are simulated and compared to the already published analytical solution. The numerical results coincide with the corrected analytical solution. This solution can be derived either by applying the principle of maximum dissipation, or by applying the force balance at the triple junction within the framework of linear irreversible thermodynamics. The change of the area of infinite and finite grains is investigated analytically and numerically. By comparing the results of both approaches, the influence of the initial topology of the structural elements on the kinetics of grain growth can be estimated. Furthermore, the kinetics of grain growth of different idealized grain boundary networks is investigated. It is shown that square shaped grains surrounded by hexagons and dodecagons result in a more realistic grain growth scenarios than squares surrounded by octagons. A deviation from idealized grain boundary arrangements is e.g., observed, due to different triple junction mobilities, and the initially n-sided regular grain deforms in a complex manner.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

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 periodika

Metals

ISSN

2075-4701

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

000455072100001

EID výsledku v databázi Scopus

2-s2.0-85057555372