Grain-boundary strengthening in nanocrystalline chromium and the Hall- Petch coefficient of body-centered cubic metals
Journal Article
·
· Scripta Materialia
- University of Tennessee, Knoxville (UTK)
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- National Sun Yat-Sen University, Taiwan
- ORNL
Nanocrystalline Cr (nc-Cr) was synthesized by electrodeposition. Samples with various grain sizes (19 57 nm) were prepared by annealing the as-deposited sample. Microstructures were examined using X-ray and electron microscopy, and the mechanical prop- erties were evaluated using nanoindentation. The strength of nc-Cr samples apparently obeyed the classical Hall Petch relationship. It was found that hardening potency caused by grain refinement was generally higher in body-centered cubic metals than that in face-centered cubic and hexagonal close-packed metals. A possible explanation was offered.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1059342
- Journal Information:
- Scripta Materialia, Vol. 68, Issue 2; ISSN 1359-6462
- Country of Publication:
- United States
- Language:
- English
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