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Article

Effect of Aspect Ratio on the Deformation Behavior of Dislocation-Free Ni3Al Nanocubes

1
Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
2
Institut für Werkstoffe, Ruhr-Universität Bochum, 44780 Bochum, Germany
3
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(11), 2230; https://doi.org/10.3390/nano10112230
Received: 25 September 2020 / Revised: 30 October 2020 / Accepted: 1 November 2020 / Published: 10 November 2020
(This article belongs to the Section Nanofabrication and Nanomanufacturing)
This study concentrates on several factors which govern the nanoscale plasticity of in situ compressed dislocation-free Ni3Al nanocubes: cube size, aspect ratio and the presence of grooves. The yield strength of dislocation-free Ni3Al nanocubes exhibits an apparent size dependence. The size dependence is strong when cubes are smaller than 300 nm. Compared with the strength of bulk Ni3Al single crystals, the strength of nanocubes is two orders of magnitude higher, which clearly demonstrates that there is a size effect. Nanocube plasticity strongly depends on the alignment and the shape of the cubes. Deformed aligned nanocubes either display only a few localized deformation events (slip lines) or were homogenously compressed into flats due to multiple slip dislocation-mediated plasticity. For an aligned cube, crack initiation at the intersection of a slip line with a groove in the cube surface was observed. In case of a double cube, crack initiation occurs at surface irregularities, while subsequent crack propagation occurs along one or more slip planes. View Full-Text
Keywords: Ni3Al nanocubes; Ni-base superalloy single crystals; aspect ratio; in situ compression; dislocation free Ni3Al nanocubes; Ni-base superalloy single crystals; aspect ratio; in situ compression; dislocation free
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MDPI and ACS Style

Li, P.; Wang, X.; Zhou, Y.; Pfetzing-Micklich, J.; Somsen, C.; Eggeler, G. Effect of Aspect Ratio on the Deformation Behavior of Dislocation-Free Ni3Al Nanocubes. Nanomaterials 2020, 10, 2230. https://doi.org/10.3390/nano10112230

AMA Style

Li P, Wang X, Zhou Y, Pfetzing-Micklich J, Somsen C, Eggeler G. Effect of Aspect Ratio on the Deformation Behavior of Dislocation-Free Ni3Al Nanocubes. Nanomaterials. 2020; 10(11):2230. https://doi.org/10.3390/nano10112230

Chicago/Turabian Style

Li, Peng, Xinguang Wang, Yizhou Zhou, Janine Pfetzing-Micklich, Christoph Somsen, and Gunther Eggeler. 2020. "Effect of Aspect Ratio on the Deformation Behavior of Dislocation-Free Ni3Al Nanocubes" Nanomaterials 10, no. 11: 2230. https://doi.org/10.3390/nano10112230

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