Shear bands in metallic glasses are not necessarily hot
Shear bands in metallic glasses are not necessarily hot
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DOI：
10.1063/1.4895605
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发表时间：
2014-09-01
期刊：
影响因子：
6.1
通讯作者：
Hufnagel, T. C.
中科院分区：
文献类型：
--
作者：
Slaughter, Stephanie K.;Kertis, Felicitee;Hufnagel, T. C.
我们使用可熔锡涂层方法检测准静态单轴压缩下加载的非晶Zr 57Ti 5Cu 20 Ni 8Al 10中的剪切带加热。高速载荷数据允许剪切事件和最终断裂的持续时间的精确测定。在断裂前停止加载时，尽管在某些剪切带上存在高达6 μ m的剪切偏移，但我们没有看到熔化锡的证据。加载至断裂的样本显示出断裂表面附近锡熔化的证据。我们将差异归因于事件的持续时间，剪切带的持续时间（毫秒）比断裂的持续时间（微秒）长得多。(C)2014年作者。除非另有说明，否则所有文章内容均根据Creative Commons Attribution 3.0 Unported License许可。
We have used the fusible tin coating method to detect shear band heating in amorphous Zr57Ti5Cu20Ni8Al10 loaded under quasi-static uniaxial compression. High-rate load data allowed a precise determination of the duration of shearing events and final fracture. When loading was halted prior to fracture we saw no evidence of melted tin despite the presence of shear offsets up to 6 mu m on some shear bands. Samples loaded to fracture showed evidence of tin melting near the fracture surface. We attribute the difference to the duration of the events, which is much longer for shear banding (milliseconds) than for fracture (microseconds). (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.