Probing heat generation during tensile plastic deformation of a bulk metallic glass at cryogenic temperature.

ABSTRACT: Despite significant research efforts, the deformation and failure mechanisms of metallic glasses remain not well understood. In the absence of periodic structure, these materials typically deform in highly localized, thin shear bands at ambient and low temperatures. This process usually leads to an abrupt fracture, hindering their wider use in structural applications. The dynamics and temperature effects on the formation and operation of those shear bands have been the focus of long-standing debate. Here, we use a new experimental approach based on localized boiling of liquid nitrogen by the heat generated in the shear bands to monitor the tensile plastic deformation of a bulk metallic glass submerged in a cryogenic bath. With the "nitrogen bubbles heat sensor", we could capture the heat d

SUBMITTER: Brennhaugen DDE 

PROVIDER: S-EPMC6218505 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature