Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 1997.03a
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- Pages.73-76
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- 1997
A Study on the Grain Size Dependence of Hardness in Nanocrystalline Metals
나노결정금속의 경도의 결정립도의존성에 관한 연구
Abstract
Nanocrystalline materials have been modeled as a mixture of the crystallite and the grain boundary phases. The mechanical property has been calculated using the rule of mixtures based on the volume fractions. The critical grain size concept suggested by Nieh and Wadsworth and porous material model suggested by Lee and Kim were applied to the calculation. The theoretical results fit very well with the experimental values
Keywords
- nanocrystalline metal;
- Hall-Petch eq.;
- grain size;
- grain boundary;
- triple junction;
- rule of mixture;
- grain size softening