Bending Nanoindentation and Plasticity Noise in FCC Single and Polycrystals

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 ultranano depths (< 200 nm). We find that hardness displays a statistically inverse dependence on in-p...

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Bibliographic Details
Published in:Crystals (Basel) 2019-12, Vol.9 (12), p.652
Main Authors: Bolin, Ryder, Yavas, Hakan, Song, Hengxu, Hemker, Kevin J., Papanikolaou, Stefanos
Format: Article
Language:English
Subjects:
Aluminum
avalanches
Bending
Bending stresses
crystal plasticity
Deformation effects
Displays
Face centered cubic lattice
face-centered cubic
Hardness
Investigations
MATERIALS SCIENCE
Nanoindentation
Noise
Plane stress
Plastic deformation
Plastic properties
Polycrystals
pop-in
Single crystals
Strain gauges
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Summary: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 ultranano depths (< 200 nm). We find that hardness displays a statistically inverse dependence on in-plane stress for indentation depths smaller than 10 nm, and the dependence disappears for larger indentation depths. In contrast, 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 Face Centered Cubic (FCC) crystals where ultranano hardness is sensitive to residual applied stresses, but plasticity pop-in noise is insensitive to it.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst9120652