Influence of cyclic loading on the onset of failure in a Zr-based bulk metallic glass

Influence of cyclic loading on the onset of failure in a Zr-based bulk metallic glass
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循环载荷对锆基大块金属玻璃失效发生的影响

DOI:
10.1007/s10853-014-8276-2
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发表时间:
2014
影响因子:
4.5
通讯作者:
Louzguine-Luzgin D
Louzguine-Luzgin D
中科院分区:
材料科学3区
文献类型:
--
作者:
Louzguine-Luzgin D

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对Zr62.5Cu22.5Fe5Al10大块非晶合金试样进行了单轴压缩实验。在单调加载和循环加载(反复加载到塑性开始,然后卸载)的测试的比较表明,玻璃的压缩塑性在循环加载下急剧降低。有人认为,这种效果来自应力逆转加速剪切集中的主导剪切带。与压缩-压缩疲劳结果的链接,以及金属玻璃的低周疲劳的后果被认为是。
Samples of Zr62.5Cu22.5Fe5Al10bulk metallic glass are subjected to uniaxial compression. Comparison of tests in monotonic loading and cyclic loading (repeated loading to the onset of plasticity, then unloading) shows that the compressive plasticity of the glass is drastically reduced under cyclic loading. It is argued that this effect arises from stress reversal accelerating the concentration of shear on a dominant shear band. The link with compression–compression fatigue results, and the consequences for low-cycle fatigue of metallic glasses are considered.
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