Journal Article

FZJ-2023-00013

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Direct observation of dislocation motion in the complex alloy T-Al-Mn-Fe using in-situ transmission electron microscopy

Heggen, M. (Corresponding author)FZJ* ; Feuerbacher, M.FZJ* ; Dunin-Borkowski, R. E.FZJ*

2023
Taylor & Francis London [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/33443  doi:10.1080/21663831.2022.2155492

Abstract: Metadislocations are novel defects recently identified in complex metallic alloys. It was reasoned that their propagation necessarily requires the orchestrated motion of hundreds of atoms along various crystallographic directions per elementary step. Here, we report on the direct observation of the motion of metadislocations on the atomic scale in the complex metallic alloy phase T-Al-Mn-Fe, using in-situ high-resolution transmission electron microscopy. We observe their propagation by discrete jumps between low-energy configurations. Using a tiling model, we determine their characteristic features including the Burgers vector, and identify their motion to take place in a mixed glide/climb process.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535) (POF4-535)

Appears in the scientific report 2023

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