Observations of unique plastic behavior in micro-pillars of an ultrafine-grained alloy

Nguyen Q. Chinh, Tivadar Győri, Ruslan Z. Valiev, Péter Szommer, Gábor Varga, Károly Havancsák, Terence G. Langdon

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


When ultrafine-grained (UFG) samples are deformed plastically, it is necessary to consider the role of grain boundaries even at the micrometer scale in sample size. We report here the occurrence of intensive grain boundary sliding (GBS) at room temperature in micro-pillars of a UFG aluminum alloy having an unusually high strain rate sensitivity. A consequence of this GBS is that the intermittent flow with detrimental strain avalanches characterizing micro-sized conventional crystals is not present in UFG materials, thereby illustrating a potential for effectively applying these UFG materials in micro-devices.

Original languageEnglish
Pages (from-to)75-78
Number of pages4
JournalMRS Communications
Issue number3
StatePublished - 1 Jan 2012
Externally publishedYes

Scopus subject areas

  • Materials Science(all)

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