Microstructure and Mechanical Properties of Modified Chromium and Low Alloy CrMoV Steel?s Weld Joints after Long Term Creep Exposure

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure and Mechanical Properties of Modified Chromium and Low Alloy CrMoV Steel?s Weld Joints after Long Term Creep Exposure

Popis výsledku v původním jazyce

The fundamental knowledge of structural evolution, strengthening and degradation processes occurring during creep exposure is a prerequisite for successful development of ferritic steels with higher creep resistance. Weld joints on tubes from the creep resistance Cr-Mo-V low alloy and P91 steel have been studied to characterize the changes in microstructure that occur during long term creep exposure at 575°C for up to approximately 95.000 hours. The metallographic study included transmission microscopyinvestigation and quantitative evaluation has been carried out in order to determine variations in the size and distribution of minor phase particles and subgrain structures in the base material, heat affected zones and weld metal. Precipitation strengthening of the creep resistant ferritic steels depends on the interparticle spacing (IPS) of secondary phases. Particular M23C6 and MX particles have been defined for more correct information about precipitate dispersion and mainly for effe

Název v anglickém jazyce

Microstructure and Mechanical Properties of Modified Chromium and Low Alloy CrMoV Steel?s Weld Joints after Long Term Creep Exposure

Popis výsledku anglicky

The fundamental knowledge of structural evolution, strengthening and degradation processes occurring during creep exposure is a prerequisite for successful development of ferritic steels with higher creep resistance. Weld joints on tubes from the creep resistance Cr-Mo-V low alloy and P91 steel have been studied to characterize the changes in microstructure that occur during long term creep exposure at 575°C for up to approximately 95.000 hours. The metallographic study included transmission microscopyinvestigation and quantitative evaluation has been carried out in order to determine variations in the size and distribution of minor phase particles and subgrain structures in the base material, heat affected zones and weld metal. Precipitation strengthening of the creep resistant ferritic steels depends on the interparticle spacing (IPS) of secondary phases. Particular M23C6 and MX particles have been defined for more correct information about precipitate dispersion and mainly for effe

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

Creep 2012 : Creep and Fracture of Engineering Materials and Structures : proceedings of the 12th International Conference on ... (JIMIS 11), held at Kyoto TERRSA, Kyoto, Japan, May 27-31, 2012

ISBN

978-4-88903-407-3

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

"B42"-"B43"

Název nakladatele

The Japan Institute of Metals

Místo vydání

Sendai

Místo konání akce

Kjóto

Datum konání akce

27. 5. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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