The effect of a prior short-term ageing on mechanical and creep properties of P92 steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00485725" target="_blank" >RIV/68081723:_____/18:00485725 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.matchar.2018.01.008" target="_blank" >http://dx.doi.org/10.1016/j.matchar.2018.01.008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2018.01.008" target="_blank" >10.1016/j.matchar.2018.01.008</a>

Result language

angličtina

Original language name

The effect of a prior short-term ageing on mechanical and creep properties of P92 steel

Original language description

We have investigated the effect of prior short-term ageing on the mechanical and creep properties of tungsten and boron modified 9%Cr ferritic steel (ASTM Grade P92 steel), to provide material data base for the estimation of material degradation due to occurrence of accidental overheating in the early stage of service loading. The steel was aged at 650 °C for up to 100, 200, 500, 1000, 2000 and 5000 h prior to mechanical and creep testing. Changes in the microstructure during ageing had a slight effect on the reduction of room temperature tensile properties. A sudden decrease on impact properties occurred after ageing for 2000 h, but the occurred impact energy of about 70 J is in accordance with the specified minimum value of 68 J at room temperature for the virgin condition. nThe creep behaviour of P92 steel in the as-received condition and after different isothermal ageing exposures prior to creep was investigated at 600 and 650 °C in the power-law creep regime. The initial applied tensile stress ranged from 90 to 200 MPa. The results clearly show a detrimental influence of isothermal ageing on creep properties even after a few hundred hours. Based on microstructure analysis, which was done mostly in a qualitative way, a significant decrease in the creep life after ageing resulted from changes of the dislocation substructure and instability of Laves phase and M23C6 particles.n

Czech name

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Czech description

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Type

J_imp - 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

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)

Publication year

2018

Confidentiality

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

Name of the periodical

Materials Characterization

ISSN

1044-5803

e-ISSN

—

Volume of the periodical

136

Issue of the periodical within the volume

FEB

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

388-397

UT code for WoS article

000425075700045

EID of the result in the Scopus database

2-s2.0-85040009982