Microstructure and Creep Behavior of Fe-27Al-1Nb Alloys with Added Carbon

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10320278" target="_blank" >RIV/00216208:11320/15:10320278 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/15:00448406

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11661-015-2756-0" target="_blank" >http://dx.doi.org/10.1007/s11661-015-2756-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11661-015-2756-0" target="_blank" >10.1007/s11661-015-2756-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure and Creep Behavior of Fe-27Al-1Nb Alloys with Added Carbon

Popis výsledku v původním jazyce

The effect of Nb and C additions on the phase composition, microstructure, and creep resistance of Fe3Al-type alloys is investigated. Two alloys, which contained (at. pct) (i) 27.6 Al, 1.15 Nb and 0.19 C (Fe balance) and (ii) 27.1 Al, 1.11 Nb, and 0.76 C (Fe balance), were studied in a temperature range from 873 K to 1073 K (600 A degrees C to 800 A degrees C). The carbide in both alloys was identified as Nb6C5. The creep data can be rationalized by introducing a threshold stress, below which, the creep rate is negligible. The threshold stress and an effective stress exponent were found simultaneously by a numerical method. Using the obtained values of the threshold stress, the activation energy of creep was determined to be 328 kJ/mol. The effective stress exponent varied from 2.0 to 3.1. A breakdown of power-law behavior was observed at higher stresses. The transition occurred at the normalized creep rate of , which agrees with the rule suggested by Sherby and Burke and the diffusion coefficient D corresponding to the diffusion of Al in Fe-Al. (C) The Minerals, Metals & Materials Society and ASM International 2015

Název v anglickém jazyce

Microstructure and Creep Behavior of Fe-27Al-1Nb Alloys with Added Carbon

Popis výsledku anglicky

The effect of Nb and C additions on the phase composition, microstructure, and creep resistance of Fe3Al-type alloys is investigated. Two alloys, which contained (at. pct) (i) 27.6 Al, 1.15 Nb and 0.19 C (Fe balance) and (ii) 27.1 Al, 1.11 Nb, and 0.76 C (Fe balance), were studied in a temperature range from 873 K to 1073 K (600 A degrees C to 800 A degrees C). The carbide in both alloys was identified as Nb6C5. The creep data can be rationalized by introducing a threshold stress, below which, the creep rate is negligible. The threshold stress and an effective stress exponent were found simultaneously by a numerical method. Using the obtained values of the threshold stress, the activation energy of creep was determined to be 328 kJ/mol. The effective stress exponent varied from 2.0 to 3.1. A breakdown of power-law behavior was observed at higher stresses. The transition occurred at the normalized creep rate of , which agrees with the rule suggested by Sherby and Burke and the diffusion coefficient D corresponding to the diffusion of Al in Fe-Al. (C) The Minerals, Metals & Materials Society and ASM International 2015

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

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

ISSN

1073-5623

e-ISSN

—

Svazek periodika

46A

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1580-1587

Kód UT WoS článku

000350300900020

EID výsledku v databázi Scopus

2-s2.0-84925516203