Creep of three-phase alloy Fe-30%Al-5.2%Zr

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10318315" target="_blank" >RIV/00216208:11320/15:10318315 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/15:00448410

Výsledek na webu

<a href="http://dx.doi.org/10.4149/km_2015_3_127" target="_blank" >http://dx.doi.org/10.4149/km_2015_3_127</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4149/km_2015_3_127" target="_blank" >10.4149/km_2015_3_127</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Creep of three-phase alloy Fe-30%Al-5.2%Zr

Popis výsledku v původním jazyce

Compressive creep of alloy based on Fe-30at.%Al with addition of 5.2 at.% zirconium was studied at temperatures from 650 to 900 degrees C. The alloy was tested in two different states: (i) cast and (ii) annealed at 1000 degrees C for 50 h. The microstructure of cast alloy consisted of matrix (alpha/B2/D03) and fine lamellar eutectic composed of lambda(1) and (alpha/B2/D03). The eutectic decomposed during annealing at 1000 degrees C into lambda(1) and tau(1) phases. Stress exponents and activation energies were estimated. The values of the stress exponent n can be explained by dislocation motion controlled by climb. The values of the activation energy in both cast and annealed alloy are greater than the activation enthalpy of diffusion. Creep exposure at 900 degrees C for about 50 h is probably sufficient for attainment the three-phase structure because the same microstructure was observed after creep at 900 degrees C, in both as-cast and annealed states. In contrast, creep expositions at 650 and 700 degrees C did not influence the appearance of microstructure.

Název v anglickém jazyce

Creep of three-phase alloy Fe-30%Al-5.2%Zr

Popis výsledku anglicky

Compressive creep of alloy based on Fe-30at.%Al with addition of 5.2 at.% zirconium was studied at temperatures from 650 to 900 degrees C. The alloy was tested in two different states: (i) cast and (ii) annealed at 1000 degrees C for 50 h. The microstructure of cast alloy consisted of matrix (alpha/B2/D03) and fine lamellar eutectic composed of lambda(1) and (alpha/B2/D03). The eutectic decomposed during annealing at 1000 degrees C into lambda(1) and tau(1) phases. Stress exponents and activation energies were estimated. The values of the stress exponent n can be explained by dislocation motion controlled by climb. The values of the activation energy in both cast and annealed alloy are greater than the activation enthalpy of diffusion. Creep exposure at 900 degrees C for about 50 h is probably sufficient for attainment the three-phase structure because the same microstructure was observed after creep at 900 degrees C, in both as-cast and annealed states. In contrast, creep expositions at 650 and 700 degrees C did not influence the appearance of microstructure.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/GAP108%2F12%2F1452" target="_blank" >GAP108/12/1452: Optimalizace vysokoteplotních mechanických vlastností aluminidů železa typu Fe3Al s karbidotvornými prvky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Kovové materiály

ISSN

0023-432X

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

6

Strana od-do

127-132

Kód UT WoS článku

000355639300002

EID výsledku v databázi Scopus

2-s2.0-84937408260