title: Probing shear-band initiation in metallic glasses.
abstract: In situ acoustic emission monitoring is shown to capture the initiation of shear bands in metallic glasses. A model picture is inferred from stick-slip flow in granular media such that the origin of acoustic emission is attributed to a mechanism of structural dilatation. By employing a quantitative approach, the critical volume change associated with shear-band initiation in a metallic glass is estimated to be a few percent only. This result agrees with typical values of excess free volume found in the supercooled liquid regime near the glass transition temperature.
authors: Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, 8093 Zurich, Switzerland.
authors: D
authors: D
authors: Klaumünzer
authors: A
authors: A
authors: Lazarev
authors: R
authors: R
authors: Maass
authors: F H
authors: FH
authors: Dalla Torre
authors: A
authors: A
authors: Vinogradov
authors: J F
authors: JF
authors: Löffler