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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F15%3A00002493" target="_blank" >RIV/46747885:24210/15:00002493 - isvavai.cz</a>

Výsledek na webu

<a href="http://link.springer.com/content/pdf/10.1007%2Fs11661-015-2756-0.pdf" target="_blank" >http://link.springer.com/content/pdf/10.1007%2Fs11661-015-2756-0.pdf</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. Metallurgical and Materials

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 C to 800 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 _e=D 1/4 1013 m 2, which agrees with the rule suggested by Sherby and Burke and the diffusion co

Název v anglickém jazyce

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

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 C to 800 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 _e=D 1/4 1013 m 2, which agrees with the rule suggested by Sherby and Burke and the diffusion co

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

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

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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

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