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Cahn-rosenberg distortion and the orthorhombicity of titanium martensites
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2015 (English)In: PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, International Conference on Solid-Solid Phase Transformations in Inorganic Materials , 2015, 477-484 p.Conference paper (Refereed)Text
Abstract [en]

The orthorhombicity of martensitic structure in Ti alloys can be explained by an anisotropy of pair correlations due to short-range ordering (SRO), as proposed by Cahn and Rosenberg. We use firstprinciples supercell calculations and configurational entropy to obtain equilibrium short-range ordering degrees at temperature in eight binary Ti systems. The composition dependence of martensitic orthorhombicity shows a system-dependent sensitivity to the SRO anisotropy. Such SRO sensitivities falls into strong and weak groups, which correlate with the atomic radii of the alloying elements.

Place, publisher, year, edition, pages
International Conference on Solid-Solid Phase Transformations in Inorganic Materials , 2015. 477-484 p.
Keyword [en]
First-principles calculation, Martensitic phase transformation, Short-range ordering, Titanium alloys, Alloying elements, Anisotropy, Calculations, Intermetallics, Martensitic transformations, Phase transitions, Titanium, Composition dependence, Configurational entropy, Martensitic phase transformations, Martensitic structures, Pair correlations, Short range ordering, Supercell calculations
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-187521ScopusID: 2-s2.0-84962771580ISBN: 9780692437360OAI: oai:DiVA.org:kth-187521DiVA: diva2:938028
Conference
International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015, 28 June 2015 through 3 July 2015
Note

QC 20160616

Available from: 2016-06-16 Created: 2016-05-25 Last updated: 2016-06-16Bibliographically approved

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