Effect of thermal exposure on the microstructure and mechanical behaviour of high-chromium steel studied using sub-sized specimens

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F24%3AN0000014" target="_blank" >RIV/26316919:_____/24:N0000014 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.metallurgical-research.org/articles/metal/abs/2025/01/metal20230053/metal20230053.html" target="_blank" >https://www.metallurgical-research.org/articles/metal/abs/2025/01/metal20230053/metal20230053.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/metal/2024016" target="_blank" >10.1051/metal/2024016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of thermal exposure on the microstructure and mechanical behaviour of high-chromium steel studied using sub-sized specimens

Popis výsledku v původním jazyce

Creep-resistant steel are one of the critical materials for the energetic industry. Increasing the creep resistance up to 650 degrees C is one of the high-priority tasks in the material science. Another important issue is a problematics of residual lifetime assessment. The residual lifetime is tied to microstructure development or mechanical property development, which can be measured during the lifetime. This paper deals with thermal exposure of experimental nitrogen-free steels, promising potential use up to the temperature 650 degrees C. Both mechanical properties and microstructure evolution were followed during exposure at 650 degrees C for as long as 5000 h. Mechanical properties were measured at the exposure temperature (by tensile testing) and also at room temperature (hardness measurement). A strong correlation was found between the high-temperature tensile strength and the room temperature hardness. The tensile strength dropped by 56 MPa or 29 MPa for the experimental steel during the 500 h exposure and this decrease was closely followed by the drop in hardness. This correlation opens way for a small-scale sample extraction, intended only for a metallography and harness measurement. Such change of analysis method would significantly reduce required sample dimensions by an order of magnitude comparing with a sample intended for miniaturized tensile tests or a small-punch testing.

Název v anglickém jazyce

Effect of thermal exposure on the microstructure and mechanical behaviour of high-chromium steel studied using sub-sized specimens

Popis výsledku anglicky

Creep-resistant steel are one of the critical materials for the energetic industry. Increasing the creep resistance up to 650 degrees C is one of the high-priority tasks in the material science. Another important issue is a problematics of residual lifetime assessment. The residual lifetime is tied to microstructure development or mechanical property development, which can be measured during the lifetime. This paper deals with thermal exposure of experimental nitrogen-free steels, promising potential use up to the temperature 650 degrees C. Both mechanical properties and microstructure evolution were followed during exposure at 650 degrees C for as long as 5000 h. Mechanical properties were measured at the exposure temperature (by tensile testing) and also at room temperature (hardness measurement). A strong correlation was found between the high-temperature tensile strength and the room temperature hardness. The tensile strength dropped by 56 MPa or 29 MPa for the experimental steel during the 500 h exposure and this decrease was closely followed by the drop in hardness. This correlation opens way for a small-scale sample extraction, intended only for a metallography and harness measurement. Such change of analysis method would significantly reduce required sample dimensions by an order of magnitude comparing with a sample intended for miniaturized tensile tests or a small-punch testing.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

METALLURGICAL RESEARCH & TECHNOLOGY

ISSN

2271-3646

e-ISSN

2271-3654

Svazek periodika

122

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

10

Strana od-do

nestránkováno

Kód UT WoS článku

001382900400007

EID výsledku v databázi Scopus

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