Analysis of the relationship between changes in mechanical properties and precipitation in SUPER 304H steel during its exposure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00352127" target="_blank" >RIV/68407700:21220/21:00352127 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1088/1757-899X/1178/1/012019" target="_blank" >https://doi.org/10.1088/1757-899X/1178/1/012019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/1178/1/012019" target="_blank" >10.1088/1757-899X/1178/1/012019</a>

Result language

angličtina

Original language name

Analysis of the relationship between changes in mechanical properties and precipitation in SUPER 304H steel during its exposure

Original language description

Aim of the article is to provide properties comparison between initial state and two thermally exposed states of creep resistant steel SUPER 304H by usage of conventional and miniaturised tensile test specimens. Tests were performed at room temperature. Thermally exposed material was aged by 15 and 30 thousand hours at 675°C. This exposition which simulated accelerated operation exposition caused precipitation of intermetallic phases which affect mechanical properties like ultimate strength and elongation. The performed tests showed a decrease in elongation and ultimate strength between the first exposed state and initial state followed by partial increase of both tested values for the second exposed state. Sigma phase precipitation was confirmed for the exposed samples. The presence of the sigma phase also led to a change in the fracture morphology from full ductile (initial state) to combined ductile with the presence of brittle particle cleavage (exposed states). A comparison of the tests performed on classical and miniaturized test samples proved the possibilities of using miniaturized samples both for the basic material and for the exposed ones.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/FV40166" target="_blank" >FV40166: Evaluation of degraded steels for the construction of turbines and superheaters of power boilers (for the need to predict residual service life time and local repairs)</a><br>

Continuities

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

Publication year

2021

Confidentiality

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

Name of the periodical

IOP Conference Series: Materials Science and Engineering

ISSN

1757-8981

e-ISSN

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Volume of the periodical

1178

Issue of the periodical within the volume

012019

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

1-6

UT code for WoS article

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EID of the result in the Scopus database

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