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説明:

We investigated the morphological and crystallographic features of α' martensite variants in Ti-25 at% Hf and Ti-50 at% Hf alloys by transmission Kikuchi diffraction and transmission electron microscopy. On the basis of the results, we also discussed the formation process of variants and the self-accommodation. Both alloys, after solution-treatment and quenching in ice water, consisted of α' martensite with a hexagonal close-packed structure. The α' martensite exhibited a larger plate-like morphology several micrometers in length, along with a finer morphology with a width of tens of nanometers. The formation of {101-1}α' twins was induced within a larger correspondence variant (CV) as a lattice-invariant shear (LIS), and {101-1}α' twins were also the boundaries bounded two neighboring CVs. In formation process of the martensite variants of Ti–Hf alloys, a larger CV with a plate-like morphology is first formed with a {101-1}α' twin as an LIS in a β parent phase; finer CVs are subsequently generated from the step-like boundary with the {101-1}α' twin plane, followed by the formation of a pair of CVs with the twin plane to relax the transformation strain.

権利情報:

• In Copyright
  

  This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s40830-025-00529-w

キーワード: Ti–Hf alloy, Thermoelastic martensitic transformation, Self-accommodation, Twin, Transmission Kikuchi diffraction, Transmission electron microscopy

刊行年月日: 2025-02-21

出版者: Springer Science and Business Media LLC

掲載誌:

• Shape Memory and Superelasticity (ISSN: 2199384X) vol. 11 issue. 1 p. 100-108

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5791

公開URL: https://doi.org/10.1007/s40830-025-00529-w

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更新時刻: 2026-02-21 16:30:24 +0900

MDRでの公開時刻: 2026-02-21 13:38:39 +0900