In situ thermographic observations on the compression behavior of a relaxed Zr-based bulk-metallic glass

Journal of Materials Research - 2007
Wenhui Jiang1, F. X. Liu1, Hao-Hsiang Liao1, Hahn Choo1, Peter K. Liaw1
1Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee, 37996, USA

Tóm tắt

Using an infrared camera, the plastic deformation of a relaxed Zr52.5Cu17.9Ni14.6Al10.0Ti5.0 bulk-metallic glass in a moderately high strain rate compression was observed in situ. The specimen exhibits an inhomogeneous deformation, which is manifested by serrated plastic flow, shear banding, and obvious work softening. Shear-banding operations were observed throughout the plastic deformation. Shear-banding operations started before the nominal yielding; shear bands could not block each other, but their interaction seems to accelerate the plastic deformation. A significant increase in the specimen’s temperature was observed due to shear banding.

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