Abstract
Compressive plastic deformation experiments between 77°K and 520°K have been conducted on a bulk Pd 0.775 Cu 0.06 Si 0.165 glass. It has been confirmed that plastic deformation in this glass is highly inhomogeneous. This leads, in some cases, to void formation along the stronger shear bands. Above about 200°K, plastic deformation proceeds by jerky flow reflected in serrated stress—strain curves. Below this temperature, serrated flow is suppressed. This effect is reversible with temperature. Localized shear bands are found to be susceptible to preferential etching. It is suggested that this is due to the destruction of “short range” order of the glassy structure. Between 100°K and 520°K the ratio of the flow stress to the elastic modulus is ≈ 1 60 independent of temperature. Some factors that may contribute to the shear yield strength of the present and similar glasses are discussed.
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