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%2F60193247%3A_____%2F17%3AN0000003" target="_blank" >RIV/60193247:_____/17:N0000003 - isvavai.cz</a>
Result on the web
<a href="https://www.scientific.net/SSP.258.639" target="_blank" >https://www.scientific.net/SSP.258.639</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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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Materials Structure & Micromechanics of Fracture VIII
ISBN
978-3-03835-626-4
ISSN
1012-0394
e-ISSN
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Number of pages
4
Pages from-to
639-342
Publisher name
Trans Tech Publications
Place of publication
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Event location
Brno, Czech Republic
Event date
Jun 27, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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