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Plastic deformation behavior was investigated
in near fully dense nanostructured and ultrafine-grained
bulk samples of carbon steel (0.55 wt% C) under compression
and tension tests. The specimens were obtained by
hot pressure from mechanically milled powder at 400 and
500 0C. Subsequent heat treatments at temperatures going
from 600 to 900 0C produced samples with ferrite grain
sizes from 30 nm to 17 lm. Nanocrystalline grained steel
samples presented very high strength with low ductility.
Once, in the ultrafine range, as the ferritic grain size was
increased, the strength was decreased and the ductility was
improved. The porosity and carbon atoms within the
structure were analyzed in order to explain the results of
strength and strain obtained.
CitationRodríguez, R.; Benito, J.; Cabrera, J. Tensile and compressive test in nanocrystalline and ultrafine carbon steel. "Journal of materials science", Setembre 2010, vol. 45, núm. 17, p. 4796-4804.
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