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Characterization of microstructure of crept samples of dissimilar weld joint using standard and advanced electron microscopy techniques

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F20%3AN0000047" target="_blank" >RIV/47718684:_____/20:N0000047 - isvavai.cz</a>

  • Result on the web

    <a href="http://www.scientific.net" target="_blank" >http://www.scientific.net</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.405.294" target="_blank" >10.4028/www.scientific.net/DDF.405.294</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Characterization of microstructure of crept samples of dissimilar weld joint using standard and advanced electron microscopy techniques

  • Original language description

    Conventional long-term creep test (CCT) to the rupture and so called accelerated creep test (ACT) of the dissimilar weld joint made of FB2 and F martensitic steels and of the base materials were carried out at temperatures ranging from 550 °C to 650 °C in the stress range from 70 to 220 MPa. Assessment of microstructure development and changes of hardness was correlated with the creep strength. During creep at temperatures above 575 °C Laves phase precipitated in all parts of the weld joint and especially in the heat affected zones. Coarse Laves phase particles and their clusters with chromium carbides served as nucleation centers for cavities. As the fine grained heat affected zone of F steel was the softest part of the weld joint, many cavities originated and cause failure of samples. Microstructure of tested samples was evaluated The aim of this paper is to compare results and possibilities of the “standard” methods and advanced scanning electron microscopy performed by instrument equipped with a concentric backscatter electron detector (CBS). Filtering of the signal enables improving and/or diminishing of selected type of contrast caused by various types of particles of secondary phases. The images were used as an input data for image analysis and developments of microstructures during CCT and ACT were compared. Results have shown that specimens after ACT contains significantly lower content of the Laves phase.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database

  • CEP classification

  • OECD FORD branch

    20501 - Materials engineering

Result continuities

  • Project

    <a href="/en/project/TE01020118" target="_blank" >TE01020118: Electron microscopy</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Defect and Diffusion Forum

  • ISSN

    1012-0386

  • e-ISSN

  • Volume of the periodical

    405

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    CH - SWITZERLAND

  • Number of pages

    6

  • Pages from-to

    294-299

  • UT code for WoS article

  • EID of the result in the Scopus database

    2-s2.0-85097623310