Influence of severe plastic deformation and subsequent annealing on creep behaviour of martensitic 9% Cr steel
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00576256" target="_blank" >RIV/68081723:_____/21:00576256 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.37904/metal.2021.4147" target="_blank" >http://dx.doi.org/10.37904/metal.2021.4147</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.37904/metal.2021.4147" target="_blank" >10.37904/metal.2021.4147</a>
Alternative languages
Result language
angličtina
Original language name
Influence of severe plastic deformation and subsequent annealing on creep behaviour of martensitic 9% Cr steel
Original language description
The objective of the study is to evaluate the effects of severe plastic deformation (SPD) and annealing on creep behaviour of advanced tungsten modified creep-resistant 9 % Cr martensitic P92 steel. The as-received P92 steel was deformed by high-pressure torsion (HTP), high-pressure sliding (HPS) and rotary swaging (RS) at room temperature prior creep testing. These SPD methods imposed significantly different equivalent plastic strain in the range from 1 up to 20. Constant load creep tests in tension were performed in an argon atmosphere at 873 K and applied stress ranging from 50 to 200 MPa. The microstructure and phase composition of P92 steel were studied using a scanning electron microscope Tescan Lyra 3 and a transmission electron microscope Jeol 2100F. The results show that under the same creep loading conditions the HPT and HPS-processed P92 steel exhibited significantly faster minimum creep rates, creep fracture strain and the decrease in the value of the stress exponent of the creep rate in comparison with as-received P92 steel. However, it was revealed that the RS-processed specimens exhibited one order of magnitude lower minimum creep rate and lower ductility compared to commercial P92 steel. The creep curves for the HPT and HPS-processed states exhibited a pronounced minimum of strain rate. The pronounced minimum of strain rate disappeared when these states were annealed at 923K/500h before application of creep loading. The microstructure changes occurring during creep and different creep behaviour between as-received and deformed states are discussed.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA19-18725S" target="_blank" >GA19-18725S: Influence of microstructure on creep mechanisms in advanced heat resistant steels</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
METAL 2021. 30th Anniversary International Conference on Metallurgy and Materials. Conference proceedings
ISBN
978-80-87294-99-4
ISSN
2694-9296
e-ISSN
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Number of pages
6
Pages from-to
429-434
Publisher name
TANGER
Place of publication
Ostrava
Event location
Brno
Event date
May 26, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001242770500067