In situ TEM observation of HCP to FCC transitions in hexagonal close-packed titanium

Yuan Ma; Yongqing Chen; Xinyang Yu; Binglu Zhang; Luning Wang; Yang He

doi:10.1080/21663831.2024.2404158

Materials Research Letters (Dec 2024)

In situ TEM observation of HCP to FCC transitions in hexagonal close-packed titanium

Yuan Ma,
Yongqing Chen,
Xinyang Yu,
Binglu Zhang,
Luning Wang,
Yang He

Affiliations

Yuan Ma: Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
Yongqing Chen: Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
Xinyang Yu: Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
Binglu Zhang: Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
Luning Wang: Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
Yang He: Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China

DOI: https://doi.org/10.1080/21663831.2024.2404158
Journal volume & issue: Vol. 12, no. 12
pp. 956 – 962

Abstract

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It remains controversial as to whether a face-centered cubic (FCC) phase exists in pure titanium (Ti) upon deformation, since the FCC structures in deformed Ti may well be TiHx resulting from the sample preparation process. Here, by using in situ transmission electron microscopy (TEM), we uncover direct evidences on the nucleation and growth of FCC-Ti right in front of the crack tip in the α-Ti matrix. Atomic resolution images further reveal that the transformation can be mediated by either partial dislocations on basal planes or shear and atomic shuffle on the FCC1 1 0|HCP1 0 -1 0 interfaces.

Published in Materials Research Letters

ISSN: 2166-3831 (Online)
Publisher: Taylor & Francis Group
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.tandfonline.com/journals/tmrl

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