Effect of severe plastic deformation on creep behaviour and microstructure changes of P92 at 923K

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00546194" target="_blank" >RIV/68081723:_____/21:00546194 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.elis.sk/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=7297&category_id=176&option=com_virtuemart&vmcchk=1&Itemid=1" target="_blank" >http://www.elis.sk/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=7297&category_id=176&option=com_virtuemart&vmcchk=1&Itemid=1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4149/km_2021_3_141" target="_blank" >10.4149/km_2021_3_141</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of severe plastic deformation on creep behaviour and microstructure changes of P92 at 923K

Popis výsledku v původním jazyce

The creep behaviour of P92 steel at 923 K, deformed by rotary swaging (RS) and high-pressure torsion (HPT), was investigated. The RS-processed state contained extremely inhomogeneous microstructure containing large elongated and fine, more or less equiaxed grains. By contrast, the HPT-processed state consists of homogeneous fine-grained microstructure. It was found that both the microstructures coarsen not only with the increasing creep time but also with creep strain. The creep strain significantly accelerates the coarsening of the microstructure, especially in the HPT-processed state. The grain coarsening during creep leads to the change of the creep rate stress exponent n thus to the change of creep mechanism. The value of n depends on the ratio grain versus stationary subgrain size. P92 steel processed by RS and HPT exhibited faster <(epsilon)over dot>(min) and higher ductility compared to coarse-grained (CG) state. However, RS-processed P92 steel can exhibit at high stresses similar creep behaviour as CG state.

Název v anglickém jazyce

Effect of severe plastic deformation on creep behaviour and microstructure changes of P92 at 923K

Popis výsledku anglicky

The creep behaviour of P92 steel at 923 K, deformed by rotary swaging (RS) and high-pressure torsion (HPT), was investigated. The RS-processed state contained extremely inhomogeneous microstructure containing large elongated and fine, more or less equiaxed grains. By contrast, the HPT-processed state consists of homogeneous fine-grained microstructure. It was found that both the microstructures coarsen not only with the increasing creep time but also with creep strain. The creep strain significantly accelerates the coarsening of the microstructure, especially in the HPT-processed state. The grain coarsening during creep leads to the change of the creep rate stress exponent n thus to the change of creep mechanism. The value of n depends on the ratio grain versus stationary subgrain size. P92 steel processed by RS and HPT exhibited faster <(epsilon)over dot>(min) and higher ductility compared to coarse-grained (CG) state. However, RS-processed P92 steel can exhibit at high stresses similar creep behaviour as CG state.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA19-18725S" target="_blank" >GA19-18725S: Vliv mikrostruktury na creepové mechanismy v pokročilých žárupevných ocelích</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Kovové materiály

ISSN

0023-432X

e-ISSN

1338-4252

Svazek periodika

59

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

8

Strana od-do

141-148

Kód UT WoS článku

000667968400001

EID výsledku v databázi Scopus

2-s2.0-85112697521