The Changes in Mechanical Properties of Austenitic Creep Resistant Steels SUPER 304H and HR3C Caused by Medium-term Isothermal Ageing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00302917" target="_blank" >RIV/68407700:21220/17:00302917 - isvavai.cz</a>

Result on the web

<a href="http://www.scientific.net/SSP.258.639.pdf" target="_blank" >http://www.scientific.net/SSP.258.639.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.258.639" target="_blank" >10.4028/www.scientific.net/SSP.258.639</a>

Result language

angličtina

Original language name

The Changes in Mechanical Properties of Austenitic Creep Resistant Steels SUPER 304H and HR3C Caused by Medium-term Isothermal Ageing

Original language description

The paper presents the results of the analysis of secondary phases formed during thermal exposure in creep resistant austenitic steels of SUPER 304H and HR3C types. These steels were worldwide used for construction of the superheaters (the heat exchangers) of supercritical and ultra-supercritical (USC) coal-fired power plants. In order to accelerate precipitation processes, the steels were isothermally aged at 675 °C for 20 000 h. The investigations of the precipitates were primarily focused on the occurrence of brittle phases. Changes in mechanical properties caused by occurrence of secondary phases were documented by tensile testing and measurement of the impact strength. For comparison reasons, the impact tests of the initial state of the steels were also performed. The results showed that long-term ageing had led to the significant decrease of the impact strength. Correlation between precipitation of secondary phase and measured values of mechanical properties is shown. The influence of brittle phases on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.

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

20704 - Energy and fuels

Project

<a href="/en/project/LO1207" target="_blank" >LO1207: Support of Sustainability of the Innovation Centre of Diagnostics and Applications of Materials at CTU-FME in Prague</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

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

Name of the periodical

Solid State Phenomena

ISSN

1012-0394

e-ISSN

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Volume of the periodical

258

Issue of the periodical within the volume

January

Country of publishing house

CH - SWITZERLAND

Number of pages

4

Pages from-to

639-642

UT code for WoS article

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EID of the result in the Scopus database

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