Microstructures, mechanical properties and oxidation behaviour of single-phase Fe3Al (D0(3)) and two-phase alpha-Fe,Al (A2) + Fe3Al (D0(3)) Fe-Al-V alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10334796" target="_blank" >RIV/00216208:11320/16:10334796 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.intermet.2016.03.004" target="_blank" >http://dx.doi.org/10.1016/j.intermet.2016.03.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.intermet.2016.03.004" target="_blank" >10.1016/j.intermet.2016.03.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructures, mechanical properties and oxidation behaviour of single-phase Fe3Al (D0(3)) and two-phase alpha-Fe,Al (A2) + Fe3Al (D0(3)) Fe-Al-V alloys

Popis výsledku v původním jazyce

Microstructures, mechanical properties and oxidation behaviour of single-phase Fe3Al (D0(3)) and two-phase alpha-Fe,Al (A2) + Fe3Al (D0(3)) Fe-Al-V alloys have been studied. Alloying with vanadium substantially increases the strength of the single-phase alloys through solid solution hardening. In addition, vanadium markedly increases the D0(3)/B2 transition temperature. The change from B2 to D0(3) at a given temperature yields an additional increase in strength. The two-phase alloys have a fine-scaled coherent microstructure with D0(3) precipitates ranging between 10 and 30 nm in the as-cast state. However, marked coarsening of D0(3) is observed after annealing at 700 degrees C for 1000 h. Up to this temperature the alloys show an appreciable flow stress and creep strength, comparable to those of other iron aluminide based alloys with coherent microstructures. Oxidation tests at 700-900 degrees C revealed formation of thick and porous Fe2O3 + Al2O3 scales above 700 degrees C. Therefore, above 700 degrees C the oxidation behaviour of these alloys is inferior compared to that of other iron aluminide alloys with about the same Al content. This poor oxidation behaviour does not improve when 4-8 at.% Cr are added.

Název v anglickém jazyce

Microstructures, mechanical properties and oxidation behaviour of single-phase Fe3Al (D0(3)) and two-phase alpha-Fe,Al (A2) + Fe3Al (D0(3)) Fe-Al-V alloys

Popis výsledku anglicky

Microstructures, mechanical properties and oxidation behaviour of single-phase Fe3Al (D0(3)) and two-phase alpha-Fe,Al (A2) + Fe3Al (D0(3)) Fe-Al-V alloys have been studied. Alloying with vanadium substantially increases the strength of the single-phase alloys through solid solution hardening. In addition, vanadium markedly increases the D0(3)/B2 transition temperature. The change from B2 to D0(3) at a given temperature yields an additional increase in strength. The two-phase alloys have a fine-scaled coherent microstructure with D0(3) precipitates ranging between 10 and 30 nm in the as-cast state. However, marked coarsening of D0(3) is observed after annealing at 700 degrees C for 1000 h. Up to this temperature the alloys show an appreciable flow stress and creep strength, comparable to those of other iron aluminide based alloys with coherent microstructures. Oxidation tests at 700-900 degrees C revealed formation of thick and porous Fe2O3 + Al2O3 scales above 700 degrees C. Therefore, above 700 degrees C the oxidation behaviour of these alloys is inferior compared to that of other iron aluminide alloys with about the same Al content. This poor oxidation behaviour does not improve when 4-8 at.% Cr are added.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Intermetallics

ISSN

0966-9795

e-ISSN

—

Svazek periodika

73

Číslo periodika v rámci svazku

-

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

58-66

Kód UT WoS článku

000375822800010

EID výsledku v databázi Scopus

2-s2.0-84962710184