Temperature invariant flow stress during microcompression of a Zr-based bulk metallic glass

Wheeler, J. M.; Raghavan, R.; Michler, J.

Scripta Materialia 67 (2012)

The elevated temperature mechanical response of a Zr-based bulk metallic glass (BMG) was examined using in situ microcompression in a scanning electron microscope at temperatures up to 387 °C. The flow stress was found to remain constant with temperature at ∼2 GPa below the glass transition temperature, T g. The magnitude of the stress drops/serrations in the stress-strain curve was found to increase with temperature. Above T g, plastic flow was observed to be homogeneous without any shear band formation. © 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.