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Bending, Nanoindentation and Plasticity Noise in FCC Single and Poly Crystals
Version 1
: Received: 21 October 2019 / Approved: 22 October 2019 / Online: 22 October 2019 (15:32:12 CEST)
A peer-reviewed article of this Preprint also exists.
Bolin, R.; Yavas, H.; Song, H.; Hemker, K.J.; Papanikolaou, S. Bending Nanoindentation and Plasticity Noise in FCC Single and Polycrystals. Crystals 2019, 9, 652. Bolin, R.; Yavas, H.; Song, H.; Hemker, K.J.; Papanikolaou, S. Bending Nanoindentation and Plasticity Noise in FCC Single and Polycrystals. Crystals 2019, 9, 652.
Abstract
We present a high-throughput nanoindentation study of in-situ bending effects on incipient plastic deformation behavior of polycrystalline and single-crystalline pure aluminum and pure copper at ultra-nano depths (<200nm). We find that hardness displays a statistically inverse dependence on in-plane stress for indentation depths smaller than 10nm, and the dependence disappears for larger indentation depths. In addition, plastic noise in the nanoindentation force and displacement displays statistically robust noise features, independently of applied stresses. Our experimental results suggest the existence of a regime in FCC crystals where ultra-nano hardness is sensitive to residual applied stresses, but plasticity pop-in noise is insensitive to it.
Keywords
nanoindentation; pop-in; crystal plasticity; hardness; avalanches; noise; face-centered cubic
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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