Applicability of empirical formulas and fractography for assessment of creep life and creep fracture modes of tempered 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_____%2F17%3A00476631" target="_blank" >RIV/68081723:_____/17:00476631 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.4149/km_2017_2_69" target="_blank" >http://dx.doi.org/10.4149/km_2017_2_69</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4149/km_2017_2_69" target="_blank" >10.4149/km_2017_2_69</a>
Alternative languages
Result language
angličtina
Original language name
Applicability of empirical formulas and fractography for assessment of creep life and creep fracture modes of tempered martensitic 9%Cr steel
Original language description
In this study, the creep behaviour of P92 steel in as-received condition and after long-term isothermal ageing was investigated at 600 and 650 degrees C using uniaxial tension creep tests. The creep testing was carried out in the power-law creep region. The analyses of creep data indicate that creep behaviour of the steel under investigation obeys both Monkman-Grant and modified Monkman-Grant empirical formulas and provides high values of creep damage factor A. The tertiary creep was examined in terms of the variations of the time to onset of tertiary creep tot with the time to fracture t(f). To assess the effect of damage process on the loss of creep strength, most creep tests were followed by fractographic investigations. It was observed that the large Laves phase particles, which coarsened during creep exposure, served as preferred sites for creep cavity nucleation. The fractography of creep ruptured specimens revealed a dominant transgranular fracture mode by necking at the highest stresses, and a mixture of transgranular and intergranular fracture modes at medium and low-stress regions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
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)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Kovové materiály
ISSN
0023-432X
e-ISSN
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Volume of the periodical
55
Issue of the periodical within the volume
2
Country of publishing house
SK - SLOVAKIA
Number of pages
12
Pages from-to
69-80
UT code for WoS article
000400952500001
EID of the result in the Scopus database
2-s2.0-85018785093