Merging of the α and Β relaxations and aging via the Johari-Goldstein modes in rapidly quenched metallic glasses

Jörg Hachenberg, Dennis Bedorf, Konrad Samwer, Ranko Richert, Annelen Kahl, Marios D. Demetriou, William L. Johnson

Research output: Contribution to journalArticle

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Abstract

This paper provides evidence that the physical aging of deeply and rapidly quenched metallic glasses is promoted by the Johari-Goldstein slow Β relaxation, resulting in a significant irreversible increase in the mechanical modulus on initial heating. Dynamic mechanical analysis has been used to characterize relaxation phenomena of a strong and a fragile metallic glass. In addition, we can extrapolate the temperature dependence of Β - and α -relaxation peaks to higher temperatures and calculate the merging temperature for both types of glasses.

Original languageEnglish (US)
Article number131911
JournalApplied Physics Letters
Volume92
Issue number13
DOIs
StatePublished - Apr 10 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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