Stress-dependent grain size evolution of nanocrystalline Ni-W and its impact on friction behavior
Journal Article
·
· Scripta Materialia
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
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.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1257816
- Report Number(s):
- SAND-2016-4213J; PII: S1359646216301804
- Journal Information:
- Scripta Materialia, Vol. 123, Issue C; ISSN 1359-6462
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 39 works
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