Stress-dependent grain size evolution of nanocrystalline Ni-W and its impact on friction behavior [electronic resource].
- Washington, D.C. : United States. National Nuclear Security Administration, 2016. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 26-29 : digital, PDF file
- Additional Creators:
- Sandia National Laboratories, United States. National Nuclear Security Administration, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- The friction behavior of ultra-nanocrystalline Ni-W coatings was investigated. A critical stress threshold was identified below which friction remained low, and above which a time-dependent evolution toward higher friction behavior occurred. Founded on established plasticity models we propose a correlation between surface grain size and applied stress that can be used to predict the critical stress separating the two friction regimes. Lastly, this interpretation of plasticity models suggests that macro-scale low and high friction regimes are respectively associated with the nano-scale mechanisms of grain boundary and dislocation-mediated plasticity.
- Published through SciTech Connect., 06/07/2016., "sand--2016-4213j", ": S1359646216301804", Scripta Materialia 123 C ISSN 1359-6462 AM, and N. Argibay; T. A. Furnish; B. L. Boyce; B. G. Clark; M. Chandross.
- Funding Information:
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