Direct observation of dislocation formation and plastic anisotropy in Nb2AlC MAX phase using in situ nanomechanics in transmission electron microscopy

Kabiri Y, Schrenker N, Müller J, Mackovic M, Spiecker E (2017)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Scripta Materialia Elsevier

Book Volume: 137

Pages Range: 104-108

URI: http://www.sciencedirect.com/science/article/pii/S1359646217301914

DOI: 10.1016/j.scriptamat.2017.04.015

Abstract

We report on the direct observation of nucleation and propagation of basal plane dislocations in Nb₂AlC, a member of MAX phases, using nanomechanical testing inside a transmission electron microscope. Different loading directions with respect to the basal plane resulted in completely different plastic response due to the pronounced anisotropy of the layered crystal. Discrete dislocation activities were correlated to distinct events in the force-displacement curves. In situ observations together with post-mortem contrast analyses of deformed regions show no indication of cross-slip or entanglement of dislocations during the indentations.

Authors with CRIS profile

Yoones Kabiri
Nadine Schrenker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Julian Müller Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Mirza Mackovic Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Exzellenz-Cluster Engineering of Advanced Materials Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

How to cite

APA:

Kabiri, Y., Schrenker, N., Müller, J., Mackovic, M., & Spiecker, E. (2017). Direct observation of dislocation formation and plastic anisotropy in Nb2AlC MAX phase using in situ nanomechanics in transmission electron microscopy. Scripta Materialia, 137, 104-108. https://doi.org/10.1016/j.scriptamat.2017.04.015

MLA:

Kabiri, Yoones, et al. "Direct observation of dislocation formation and plastic anisotropy in Nb2AlC MAX phase using in situ nanomechanics in transmission electron microscopy." Scripta Materialia 137 (2017): 104-108.

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