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Continuum modeling of the reverse Hall-Petch effect in nanocrystalline metals under uniaxial tension: How many grains in a finite element model?

Abstract:

Owing to their very high strength, nanocrystalline metals have been extensively studied over the recent years. The direct Hall-Petch law, empirically proportioning the material strength to the inverse square root of its grain size has been shown to break down below a grain size of the order of tenths of nanometers. This phenomenon has been widely rationalized as a gradual switch from intragrain mediated deformation mechanisms to grain boundary mediated deformation mechanisms. This transition ...

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Journal:
Philosophical Magazine Letters
Volume:
91
Issue:
9
Pages:
599-609
Publication date:
2011-09-05
DOI:
EISSN:
1362-3036
ISSN:
0950-0839
URN:
uuid:5e47f947-100b-4b25-b3f4-3d75687e6ad7
Source identifiers:
367456
Local pid:
pubs:367456

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