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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Isothermal stress relaxation of bulk and ribbon Zr-based metallic glass
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Isothermal stress relaxation of bulk and ribbon Zr-based metallic glass

机译：块状和带状Zr基金属玻璃的等温应力松弛

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摘要

The results of density and stress relaxation measurements in glassy Zr52.5Ti5Cu17.9Ni14.6Al10 in the bulk and ribbon forms are presented. It is found that the density of bulk samples is higher than that of ribbon specimens while the stress relaxation kinetics are not much affected by a change of the quenching rate of four orders of magnitude. The kinetic relaxation law is determined. The stress relaxation depth is found to decrease sharply with the preannealing time. It is concluded that (i) stress relaxation occurs as a result of irreversible stress-oriented structural relaxation with distributed activation energies; (ii) the results obtained are inconsistent with the free volume as a source of elementary relaxation events; (iii) alternatively, the relaxation centers responsible for homogeneous flow may have properties similar to those of dumbbell interstitialcies in crystalline metals. (C) 2004 Elsevier B.V. All rights reserved.
机译：给出了块状和带状玻璃态Zr52.5Ti5Cu17.9Ni14.6Al10中密度和应力松弛测量的结果。发现，大块样品的密度高于带状样品的密度，而应力松弛动力学不受四个数量级淬火速率变化的影响很大。确定动力学松弛定律。发现应力松弛深度随预退火时间而急剧减小。结论是：（i）应力松弛是由于具有分布的活化能的不可逆的应力导向结构松弛引起的; （ii）获得的结果与作为基本弛豫事件来源的自由体积不一致; （iii）或者，负责均匀流动的弛豫中心可以具有与晶体金属中的哑铃间隙相似的性质。 （C）2004 Elsevier B.V.保留所有权利。

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