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Bending Nanoindentation and Plasticity Noise in FCC Single and Polycrystals

Journal Article · · Crystals
DOI:https://doi.org/10.3390/cryst9120652· OSTI ID:2377025

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.

Research Organization:
Johns Hopkins Univ., Baltimore, MD (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014109
OSTI ID:
2377025
Alternate ID(s):
OSTI ID: 1802561
Journal Information:
Crystals, Journal Name: Crystals Journal Issue: 12 Vol. 9; ISSN CRYSBC; ISSN 2073-4352
Publisher:
MDPI AGCopyright Statement
Country of Publication:
Germany
Language:
English

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