Increasing the strength of nanocrystalline steels by annealing: Is segregation necessary?

Hardening phenomena in nanocrystalline metals after annealing have been widely reported, and the subject of much recent debate. Solute segregation to grain boundaries and dislocation source hardening have been proposed to cause the strengthening. To shed light on the dominant mechanisms, we present...

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Detalles Bibliográficos
Autores principales: Renk, O., Hohenwarter, A., Eder, K., Kormout, K.S., Cairney, J.M., Pippan, R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pergamon 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4235774/
https://www.ncbi.nlm.nih.gov/pubmed/25598694
http://dx.doi.org/10.1016/j.scriptamat.2014.09.023
Descripción
Sumario:Hardening phenomena in nanocrystalline metals after annealing have been widely reported, and the subject of much recent debate. Solute segregation to grain boundaries and dislocation source hardening have been proposed to cause the strengthening. To shed light on the dominant mechanisms, we present results from mechanical experiments and atom probe tomography on samples with similar grain size but different amounts of solute segregation and different boundary chemistries.

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