EFFECTS OF TEST TEMPERATURE ON FLOW OF METALLIC GLASSES | Zendy

A. Shamimi Nouri | Zendy; Yan Liu | Zendy; Paul Wesseling | Zendy; John J. Lewandowski | Zendy

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EFFECTS OF TEST TEMPERATURE ON FLOW OF METALLIC GLASSES

Author(s) -

A. Shamimi Nouri,

Yan Liu,

Paul Wesseling,

John J. Lewandowski

Publication year - 2006

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/886562

Subject(s) - materials science , amorphous metal , indentation hardness , composite material , softening , deformation (meteorology) , glass transition , atmospheric temperature range , hardness , metallurgy , thermodynamics , microstructure , physics , polymer , alloy

Micro-hardness experiments were conducted over a range of temperatures using a Nikon QM micro-hardness machine on a number of metallic glass (e.g. Zr-, Fe-, Al-) systems. Although high micro-hardness was exhibited at room temperature, significant hardness reductions were exhibited near the glass transition temperature, T{sub g}. The effects of changes in test temperature on the micro-hardness will be reported. The effects of exposure time on the hardness evolution at a given temperature will also be summarized to illustrate some of the differences in behavior of the systems shown. The extreme softening near T{sub g}, characteristic of bulk metallic glass systems, enables the exploration of novel deformation processing. In order to develop deformation processing windows, the evaluation of bulk metallic glass mechanical properties under quasi-static conditions and the determination of flow properties at different temperatures and strain rates are reported. The use of such information to create layered/composite bulk metallic glasses will be summarized

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