The Effect of Long-term Ageing on Microstructural Properties and Laves Phase Precipitation of Welded P91 and P92 Steels

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00350998" target="_blank" >RIV/68407700:21220/22:00350998 - isvavai.cz</a>

Alternative codes found

RIV/60193247:_____/22:N0000022

Result on the web

<a href="https://doi.org/10.1002/srin.202100311" target="_blank" >https://doi.org/10.1002/srin.202100311</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/srin.202100311" target="_blank" >10.1002/srin.202100311</a>

Result language

angličtina

Original language name

The Effect of Long-term Ageing on Microstructural Properties and Laves Phase Precipitation of Welded P91 and P92 Steels

Original language description

Creep resistant 9% Cr steels P91 and P92 are frequently used in civil engineering projects of supercritical coal-fired power plants operating at temperatures of superheated steam around 610°C. This paper focus on analysis of microstructure degradation and degradation of mechanical properties of orbital narrow-gap welding of P91 a P92 steels. Nowadays welding technology of orbital narrow-gap using tungsten inert gas is not limited to welding of high-pressure steam pipelines. This method is highly productive and efficient and leads to an increase in productivity, quality and repeatability of welding process. It replaces the original method of manual welding with coated electrode into a standard bevel, which is a time-consuming process that costs a high amount of weld metal. Welds were degraded at 650°C/30000 h without applied stress and the effect of degradation was evaluated across the weld based on the observed changes in microstructure and hardness. Attention was focused mainly on precipitation and coarsening of Laves phase in the main areas of HAZ of P92 steel: coarse grain HAZ, fine grain HAZ and intercritical HAZ. The results show that frequency and rate of Laves phase coarsening in the fine grain and coarse grain HAZ is higher than in the base material.

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

2022

Confidentiality

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

Name of the periodical

Steel Research International

ISSN

1611-3683

e-ISSN

1869-344X

Volume of the periodical

93

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

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UT code for WoS article

000693899100001

EID of the result in the Scopus database

2-s2.0-85114109277