The Effect of Predeformation on Creep Strength ofn9% Cr Steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F20%3A00535173" target="_blank" >RIV/68081723:_____/20:00535173 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/1996-1944/13/23/5330" target="_blank" >https://www.mdpi.com/1996-1944/13/23/5330</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma13235330" target="_blank" >10.3390/ma13235330</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Predeformation on Creep Strength ofn9% Cr Steel

Popis výsledku v původním jazyce

Martensitic creep-resistant P92 steel was deformed by different methods of severe plasticndeformation such as rotation swaging, high-pressure sliding, and high-pressure torsion at roomntemperature. These methods imposed significantly different equivalent plastic strains of aboutn1–30. It was found that rotation swaging led to formation of heterogeneous microstructures withnelongated grains where low-angle grain boundaries predominated. Other methods led to formationnof ultrafine-grained (UFG) microstructures with high frequency of high-angle grain boundaries.nConstant load tensile creep tests at 873 K and initial stresses in the range of 50 to 300 MPa revealednthat the specimens processed by rotation swaging exhibited one order of magnitude lower minimumncreep rate compared to standard P92 steel. By contrast, UFG P92 steel is significantly softer thannstandard P92 steel, but differences in their strengths decrease with increasing stress. Microstructuralnresults suggest that creep behavior of P92 steel processed by severe plastic deformation is influencednby the frequency of high-angle grain boundaries and grain coarsening during creep.

Název v anglickém jazyce

The Effect of Predeformation on Creep Strength ofn9% Cr Steel

Popis výsledku anglicky

Martensitic creep-resistant P92 steel was deformed by different methods of severe plasticndeformation such as rotation swaging, high-pressure sliding, and high-pressure torsion at roomntemperature. These methods imposed significantly different equivalent plastic strains of aboutn1–30. It was found that rotation swaging led to formation of heterogeneous microstructures withnelongated grains where low-angle grain boundaries predominated. Other methods led to formationnof ultrafine-grained (UFG) microstructures with high frequency of high-angle grain boundaries.nConstant load tensile creep tests at 873 K and initial stresses in the range of 50 to 300 MPa revealednthat the specimens processed by rotation swaging exhibited one order of magnitude lower minimumncreep rate compared to standard P92 steel. By contrast, UFG P92 steel is significantly softer thannstandard P92 steel, but differences in their strengths decrease with increasing stress. Microstructuralnresults suggest that creep behavior of P92 steel processed by severe plastic deformation is influencednby the frequency of high-angle grain boundaries and grain coarsening during creep.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Materials

ISSN

1996-1944

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

5330

Kód UT WoS článku

000597473800001

EID výsledku v databázi Scopus

2-s2.0-85096711098