Deformation mechanisms of nanocrystalline hexagonal close-packed metals

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Abstract

Using molecular dynamics simulation, a reverse martensitic transformation from hexagonal close-packed (hep) to face-centered cubic (fee) structure is observed in nanocrystalline (nc) cobalt and zirconium undergoing plastic deformation. In nc-cobalt hcp-to-fcc transformation is prevalent and deformation twinning is rarely observed. The transformation mechanism involves the motion of Shockley partial dislocation 1/3〈1100〉 in every other (0001) hcp /(111)fcc plane. From the simulation results, it is suggested that the interaction among partials should be considered to understand the deformation mechanisms of hep nc metals.
Original languageEnglish
Title of host publicationMechanics of Nanoscale Materials and Devices
Pages43-48
Number of pages6
Volume924
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event2006 MRS Spring Meeting - San Frnacisco, CA, United States
Duration: 17 Apr 200621 Apr 2006

Conference

Conference2006 MRS Spring Meeting
CountryUnited States
CitySan Frnacisco, CA
Period17/04/0621/04/06

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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