Orientation influence on grain size-effects in ultrafine-grained magnesium
Journal Article
·
· Scripta Materialia
- Sichuan Univ., Chengdu (China); Johns Hopkins Univ., Baltimore, MD (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Johns Hopkins Univ., Baltimore, MD (United States)
The mechanical behavior of ultrafine-grained magnesium was studied by discrete dislocation dynamics (DDD) simulations. Our results show basal slip yields a strong size effect, while prismatic and pyramidal slips produce a weak one. We developed a new size-strength model that considers dislocation transmission across grain boundaries. Good agreement between this model, current DDD simulations and previous experiments is observed. These results reveal that the grain size effect depends on 3 factors: Peierls stress, dislocation source strength and grain boundary strength.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1257300
- Report Number(s):
- LLNL-JRNL-694164
- Journal Information:
- Scripta Materialia, Vol. 97; ISSN 1359-6462
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 40 works
Citation information provided by
Web of Science
Web of Science
Advances in Discrete Dislocation Dynamics Modeling of Size-Affected Plasticity
|
book | January 2016 |
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