Compressive creep of Fe3Al-type iron alumide with Zr additions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F08%3A00310263" target="_blank" >RIV/68081723:_____/08:00310263 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Compressive creep of Fe3Al-type iron alumide with Zr additions

Original language description

High-temperature creep of a Fe3Al-type iron aluminide alloyed by zirconium was studied in the temperature range 873?1073 K. The alloy contained (wt.%) 31.5% Al, 3.5% Cr, 0.25% Zr, 0.19% C (Fe balance). It was tested in two states: (i) as received after hot rolling and (ii) heat treated (1423 K/ 2 h/air). Creep tests were performed in compression at constant load with stepwise loading: in each step, the load was changed to a new value after steady state creep rate had been established. Stress exponent and activation energy of the creep rate were determined and possible creep mechanisms were discussed in terms of the threshold stress concept. A rapid fall of the stress exponent and of the threshold stress with the increasing temperature indicates that creep is impeded by the presence of precipitates only at temperature 873 K. The results were compared with the results of long-term creep tests in tension performed recently on the same alloy.

Czech name

Tlakový creep aluminidu železa typu Fe3Al s přídavkem zirkonia

Czech description

Vysokoteplotní creep aluminidu železa typu Fe3Al legovaného zirkoniem byl studován v teplotním rozsahu 873 až 1073 K. Slitina byla studována ve dvou různých stavech: (i) po válcování za tepla a (ii) po tepelném zpracování (1423 K/2 hodiny/vzduch). Byl určen napěťový exponent a aktivační energie rychlosti creepu a možné mechanismy creepu byly diskutovány pomocí koncepce prahového napětí. Výsledky byly porovnány s výsledky dlouhodobých creepových zkoušek v tahu provedených nedávno na stejné slitině.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

<a href="/en/project/GA106%2F05%2F0409" target="_blank" >GA106/05/0409: The analysis of mechanisms and factors influencing the creep resistance of perspective iron aluminides on the basis of Fe3Al and FeAl</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

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

Name of the periodical

Problemy pročnosti (Strength of Materials)

ISSN

0556-171X

e-ISSN

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Volume of the periodical

-

Issue of the periodical within the volume

1

Country of publishing house

UA - UKRAINE

Number of pages

4

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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