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Study of the mean size and fraction of the second-phase particles in a 13% chromium steel at high temperature
Dalarna University, School of Technology and Business Studies, Materials Technology. KTH Royal Institute of Technology.ORCID iD: 0000-0002-3812-5285
Sandvik Materials Technology.
Dalarna University, School of Technology and Business Studies, Materials Technology.
KTH Royal Institute of Technology.
2019 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, p. 1-17Article in journal (Refereed) Published
Abstract [en]

The mean size and fraction of the second-phase particles in a 13% chromium steel are investigated, while no plastic deformation was applied. The results of the measurement are compared with the modelling results from a physicallybased model. The heating sequence is performed on samples using a Gleeble thermo-mechanical simulator over the temperature range of 850?1200°C. Using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), the size distribution and composition of the carbides were evaluated, respectively. For obtaining particle size distribution (PSD), an image-processing software was employed to analyse the SEM images. Additionally, the relation between the 2D shape factor and size of the particles is also studied at different temperatures and most of the particles turned out to have a shape factor close to two. In order to measure the carbide weight fraction, electrochemical phase isolation was employed. The Ms and fraction of the martensite phase after quenching of samples are calculated and the results were comparable with the measured hardness values at corresponding temperatures. The measured hardness of the samples is found to comply very well with the measured mean size of the precipitates. The calculated mean size of the particles from the model shows very good agreement with both hardness value and experimentally measured mean size, while the calculated volume fraction from simulation follows a slightly different trend.

Place, publisher, year, edition, pages
Taylor & Francis , 2019. p. 1-17
National Category
Metallurgy and Metallic Materials
Research subject
Steel Forming and Surface Engineering
Identifiers
URN: urn:nbn:se:du-31030DOI: 10.1080/14786435.2019.1674455Scopus ID: 2-s2.0-85074354022OAI: oai:DiVA.org:du-31030DiVA, id: diva2:1365304
Available from: 2019-10-24 Created: 2019-10-24 Last updated: 2019-11-21Bibliographically approved

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Safara Nosar, NimaEngberg, Göran

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