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Ultrafast extreme rejuvenation of metallic glasses by shock compression.

ABSTRACT: Structural rejuvenation of glasses not only provides fundamental insights into their complicated dynamics but also extends their practical applications. However, it is formidably challenging to rejuvenate a glass on very short time scales. Here, we present the first experimental evidence that a specially designed shock compression technique can rapidly rejuvenate metallic glasses to extremely high-enthalpy states within a very short time scale of about 365 ± 8 ns. By controlling the shock stress amplitude, the shock-induced rejuvenation is successfully frozen at different degrees. The underlying structural disordering is quantitatively characterized by the anomalous boson heat capacity peak of glasses. A Deborah number, defined as a competition of time scales between the net structural disordering and the applied loading, is introduced to explain the observed ultrafast rejuvenation phenomena of metallic glasses.

SUBMITTER: Ding G

PROVIDER: S-EPMC6707777 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Ultrafast extreme rejuvenation of metallic glasses by shock compression.

Ding G G Li C C Zaccone A A Wang W H WH Lei H C HC Jiang F F Ling Z Z Jiang M Q MQ

Science advances 20190823 8

Structural rejuvenation of glasses not only provides fundamental insights into their complicated dynamics but also extends their practical applications. However, it is formidably challenging to rejuvenate a glass on very short time scales. Here, we present the first experimental evidence that a specially designed shock compression technique can rapidly rejuvenate metallic glasses to extremely high-enthalpy states within a very short time scale of about 365 ± 8 ns. By controlling the shock stress ...[more]

PMID: 31467974

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