Stored energy in metallic glasses due to strains within the elastic limit
Stored energy in metallic glasses due to strains within the elastic limit
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DOI：
10.1080/14786435.2016.1177231
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发表时间：
2016-01-01
影响因子：
1.6
通讯作者：
Sun, Y. H.
中科院分区：
文献类型：
--
作者：
Greer, A. L.;Sun, Y. H.
当应力低于宏观屈服应力时，金属玻璃的室温载荷使其焓升高并引起蠕变。金属玻璃在室温至77K之间的热循环也使其焓升高。在这两种情况下，焓的增加与由严重塑性变形引起的焓的增加是相当的，但是，正如我们所示，起源必须是完全不同的。对于塑性变形，焓的增加是一个分数(
Room temperature loading of metallic glasses, at stresses below the macroscopic yield stress, raises their enthalpy and causes creep. Thermal cycling of metallic glasses between room temperature and 77K also raises their enthalpy. In both cases, the enthalpy increases are comparable to those induced by heavy plastic deformation, but, as we show, the origins must be quite different. For plastic deformation, the enthalpy increase is a fraction (