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Micromechanical impact of solidification regions in ductile iron revealed via a 3D strain partitioning analysis method
Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark.
Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark.
Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-6339-4292
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2020 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 178, p. 463-467Article in journal (Refereed) Published
Abstract [en]

Strain partitioning between first-to-solidify (FTS) and last-to-solidify (LTS) regions upon tensile loading of ductile iron was investigated by combining in-situ X-ray tomography with digital volume correlation and postmortem metallographic examinations. The results indicate that the plastic shear bands form mainly by linking graphite particles contained in the same FTS region. A special distance function is introduced to show that this is due to the lower strength of the FTS regions compared to the LTS regions, but also to the higher stress concentration associated with the particles. The methodology is general and therefore extendable to material systems containing similar microstructural heterogeneities.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 178, p. 463-467
Keywords [en]
Cast iron, Digital volume correlation, Micromechanics, Solidification microstructure, Strain distribution, Ductility, Solidification, Strain measurement, Digital volume correlations, Distance functions, Graphite particles, Metallographic examination, Microstructural heterogeneity, Solidification microstructures, Strain distributions, Strain partitioning
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-47215DOI: 10.1016/j.scriptamat.2019.12.018Scopus ID: 2-s2.0-85076825424Local ID: PP JTH 2020 embargo 24;JTHMaterialISOAI: oai:DiVA.org:hj-47215DiVA, id: diva2:1382241
Available from: 2020-01-02 Created: 2020-01-02 Last updated: 2020-01-09Bibliographically approved

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The full text will be freely available from 2021-12-24 00:00
Available from 2021-12-24 00:00

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Hernando, Juan Carlos

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