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Isolation of optimal compositions of single crystal superalloys by mapping of a material's genome
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2015 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 90, 330-343 p.Article in journal (Refereed) Published
Abstract [en]

The multicomponent composition space pertinent to the single crystal nickel-based superalloys is mapped and searched, using computational modelling. A resolution of 0.1 wt.% for the alloying elements is assumed, consistent with manufacturing practice. Databases are constructed of alloy compositions which are predicted to be of promising microstructural architecture: e.g. equal fractions of the γ and γ′ phases. These may be regarded as maps - one might term them genomes - of this class of structural alloy. By combining the databases with additional composition-dependent property models, it is demonstrated that compositions can be identified which - subject to the accuracy and limitations of the sub-models - are likely to prove optimal, e.g. on the basis of their creep resistance, density and cost. The methods circumvent the need for the traditional empirically-driven approaches to alloy design.

Place, publisher, year, edition, pages
2015. Vol. 90, 330-343 p.
Keyword [en]
Alloy design space, Microstructure, Single crystal superalloys, Alloying elements, Alloys, Creep resistance, Crystal microstructure, Genes, Superalloys, Alloy compositions, Alloy designs, Composition space, Computational modelling, Manufacturing practices, Optimal composition, Single crystal nickel based superalloy, Single crystals
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-167710DOI: 10.1016/j.actamat.2015.01.040ISI: 000353753700032ScopusID: 2-s2.0-84925232764OAI: diva2:815909

QC 20150602

Available from: 2015-06-02 Created: 2015-05-22 Last updated: 2015-06-12Bibliographically approved

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Höglund, Lars
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