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  Prospects of using small scale testing to examine different deformation mechanisms in nanoscale single crystals - A case study in Mg

Kiener, D., Jeong, J., Alfreider, M., Konetschnik, R., & Oh, S. H. (2021). Prospects of using small scale testing to examine different deformation mechanisms in nanoscale single crystals - A case study in Mg. Crystals, 11(1): 61. doi:10.3390/cryst11010061.

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Prospects of Using Small Scale Testing to Examine Different Deformation Mechanisms in Nanoscale Single Crystals—A Case Study in Mg - crystals-11-00061.pdf (Publisher version), 7MB
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Prospects of Using Small Scale Testing to Examine Different Deformation Mechanisms in Nanoscale Single Crystals—A Case Study in Mg - crystals-11-00061.pdf
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2021
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 Creators:
Kiener, Daniel1, Author              
Jeong, Jiwon2, 3, Author              
Alfreider, Markus4, Author              
Konetschnik, Ruth4, Author              
Oh, Sang Ho5, 6, Author              
Affiliations:
1Department of Materials Physics, Montanuniversität Leoben, Austria, ou_persistent22              
2Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863399              
3Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea, ou_persistent22              
4Department Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Roseggerstrasse 12, 8700 Leoben, Austria, ou_persistent22              
5Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea, ou_persistent22              
6Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea, ou_persistent22              

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 Abstract: The advent of miniaturised testing techniques led to excessive studies on size effects in ma-terials. Concomitantly, these techniques also offer the capability to thoroughly examine deformation mechanisms operative in small volumes, in particular when performed in-situ in electron micro-scopes. This opens the feasibility of a comprehensive assessment of plasticity by spatially arranging samples specifically with respect to the crystal unit cell of interest. In the present manuscript, we will showcase this less commonly utilised aspect of small-scale testing on the case of the hexagonal metal Mg, where, besides dislocation slip on different slip planes, twinning also exists as a possible deformation mechanism. While it is close to impossible to examine individual deformation mechanisms in macroscale tests, where local multiaxial stress states in polycrystalline structures will always favour multiple mechanisms of plasticity, we demonstrate that miniaturised uniaxial experiments conducted in-situ in the scanning electron microscope are ideally suited for a detailed assessment of specific processes. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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Language(s): eng - English
 Dates: 2021-01-14
 Publication Status: Published in print
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 Identifiers: DOI: 10.3390/cryst11010061
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Title: Crystals
Source Genre: Journal
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Publ. Info: Basel, Switzerland : MDPI AG
Pages: 15 Volume / Issue: 11 (1) Sequence Number: 61 Start / End Page: - Identifier: ISSN: 2073-4352
CoNE: https://pure.mpg.de/cone/journals/resource/2073-4352