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Parametric dependency of a constitutive model describing solid state sintering of cemented carbides
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Solid Mechanics.
Sandvik Coromant AB, R&D, SE-12680 Stockholm, Sweden..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Structures.ORCID iD: 0000-0001-8797-4585
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Solid Mechanics.ORCID iD: 0000-0001-6232-8819
2022 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 403, p. 117407-, article id 117407Article in journal (Refereed) Published
Abstract [en]

This study focuses on an inverse modelling approach, using FEM to simulate the sintering of WC-Co powder using a continuum model. From a previously developed constitutive model of cemented carbide, the dependency of the material parameters is investigated in a sensitivity study. A value of sensitivity is assigned to all the material parameters and calculated at different steps in the sintering process, which represent its importance for capturing the shrinkage during sintering. The approach is that only the more sensitive parameters should be fitted when changing experimental setup or material composition, leaving the less important parameters constant, resulting in fewer tests and iterations. This approach is tested in an optimization of WC-Co powder sintering cycle, where the shrinkage curve is experimentally determined. It is concluded that some of the material parameters play a minor role in the modelling and could be set as constants in an optimization. The constitutive material model alone is unable to capture all features that appeared in the shrinkage curve during the experiment. Improvements of the model are discussed. An additional investigation, performed without heating rate dependency, shows that the remaining material parameters could compensate for the omitted heating rate for a known sintering cycle without losing accuracy.

Place, publisher, year, edition, pages
Elsevier BV , 2022. Vol. 403, p. 117407-, article id 117407
Keywords [en]
Cemented carbide, Constitutive modelling, Sintering, Sensitivity, Optimization, FEM
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-313334DOI: 10.1016/j.powtec.2022.117407ISI: 000798242100003Scopus ID: 2-s2.0-85129263449OAI: oai:DiVA.org:kth-313334DiVA, id: diva2:1663467
Note

QC 20220602

Available from: 2022-06-02 Created: 2022-06-02 Last updated: 2024-03-15Bibliographically approved

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Rosenblad, LouiseLarsson, HenrikLarsson, Per-Lennart

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