Resumo

RODRIGUEZ BARACALDO, Rodolfo; CABRERA MARRERO, José Maria  e  BENITO PARAMO, Jose Antonio. Studying the Hall-Petch effect regarding sub-micrometer steel (0.6% C). Ing. Investig. [online]. 2011, vol.31, n.3, pp.112-120. ISSN 0120-5609.

This paper study the synthesis and mechanical characterisation of steel (0.6% C) having lower than 1 micron grain size. There was severe plastic deformation in high pressure planetary ball milling and consolidation for obtaining bulk samples at temperatures between 350°C and 500°C. Studying grain size evolution showed that samples without subsequent heat treatment retained their nanocrystalline structure. Grain growth was controlled in heat-treated samples due to many nucleation points and the presence of cementite precipitates. The results obtained regarding hardness and grain size satisfactory agreed with the Hall-Petch ratio. The influence of the synthesis and mechanical characterisation techniques used in this work were compared to results mentioned in several references.

Palavras-chave : alloy steel; heat treatment; Hall-Petch relationship.

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